高二英语Book 6复习人教实验版知识精讲

高二英语Book 6复习人教实验版
【本讲教育信息】
一. 教学内容：
Book 6复习
二. 教学内容
1. 掌握常考的考纲重点动词
2. 巩固课文出现的短语
3. 语法知识再现：虚拟语气、强调句与-ing作状语的用法
三. 教学重难点
1. 重点词汇的记忆与运用
2. 虚拟语气规则及常见句型；强调句的灵活运用
3. 知识与能力的转化
［知识分析与详解］
一、重点动词的用法与考点：
1. belief n.信仰；信任；信心– believe v.相信–believable adj.可信的
经典例句：His belief is to enter Beijing University for further education.
他的信念是进入北京大学，继续深造。

beyond belief无法令人相信；令人难以置信
His story is beyond belief.
他的话难以置信。

I don’t believe you.
我不信你说的话。

Do you believe in ghosts?
你相信有鬼吗?
2. convince vt.使确信；使信服同义词：persuade
He convinced me that I should study law.他
劝我应该学法律。

It took many hours to convince the court of his guilt.
花费了许多个小时法庭才相信他有罪。

We convinced Anne to go by train rather than by plane.
我们说服了安妮放弃乘飞机而坐火车走。

3. attempt n.努力；尝试；企图；vt.尝试；企图
make an attempt at doing sth.试图做某事
make a successful attempt to do成功地做了某事=succeed in doing sth.=manage to do sth.
attempt to do sth.= try to do sth.
She made an attempt to cook the dinner.
她试着做这顿饭。

Some countries attempt to limit Chinese development.
一些国家企图限制中国的发展。

试一试：A man is being questioned in relation to the ______ murder last night.
A. advised
B. attended
C. attempted
D. admitted
答案：C 句意为：“一个涉嫌参与昨天夜里企图谋杀的人正在接受审讯。

”Attempted adj.“未遂的”符合题意。

advise v.劝说；attend v.参加；admit v.承认
4. focus v.（使）集中（多指把光、热、射线等集中在一点，也可指把精力、思想、注意力等集中在某一方面，常构成短语focus on
All eyes were focused on him.所有人的目光都集中在他的身上。

转化：focus n.（兴趣、活动等的）焦点；中心
Liu Xiang became the focus of everyone’s attention after winning the Olympic gold medal.获得奥运金牌后，刘翔成了大家关注的焦点。

5. convey vt.传达；运送
convey one’s feelings/thanks to sb.向某人表达……感情/谢意
convey sb./ sth. to sp. 把某人/物运送到某地
I found it hard to convey my feelings in words.
我觉得难以用言语来表达我的感情。

A bus conveys passengers to the airport.
一辆公共汽车把旅客送到机场。

6. manage to do sth.= succeed in doing sth.=was/were able to do sth.设法成功地做到了某事
At last we managed to understand her body language.
最后我们终于明白了她的身势语。

Without her I should not have managed it.
要是没有她的话，我是办不到这一点的。

7. risk n.冒险；风险risk vt.冒……的危险
at risk = in danger
at the risk of 冒着……之险；不顾……之风险
run/take the risk of 冒着……的危险
risk one’s life in doing sth. 冒着……生命危险做……
risk doing sth.
They risked losing everything.
8. glance vi.看一下；扫视n.一瞥
glance at一瞥联想：glare at 怒视stare at 盯着看
at a glance一见就……take a glance at 看一看
He saw at a glance that she was coming.
他一眼就看到她来了。

9. decrease vi. & vt.减少（使变小或变少）
decrease by降低了多少be decreased in sth. 在……方面有所降低
There was a decrease in the number of children in school.
在校的儿童人数有所减少。

10. impress vt.给予……深刻印象impression n. impressive adj.
impress sb. with sth. 给某人留下深刻的印象
impress on sb. sth.使某人对……印象深刻
leave/give sb. a strong impression 给某人留下深刻的印象
I impressed on him the importance of his work.
我使他注意他的工作的重要性。

11. guarantee vt.& n.保证；担保
Lack of interest is a guarantee of failure.
缺乏兴趣肯定会导致失败。

guarantee sth. against sth.提供保修单
be guaranteed to do sth.肯定会；必定会
The leader of the factory announced that it was guaranteed to decrease the price of its production.
厂领导宣称产品的价格一定会下调。

二. 重点短语用法归纳：
1. would rather do A than do B…宁愿干A而不愿干B
Fat children would rather lie on the sofa watching TV than do a little housework.
否定：would rather not do…宁愿不干……
would rather sb. not do…宁愿某人不干……
注意：在虚拟语气结构中would rather sb. did…（与现在或将来有关）宁愿某人现在或将来干……；would rather sb. had done…（与过去有关）宁愿某人过去干……
Eg. —Would you mind if I smoke?
—I would r ather you didn’t.
2. aim at 对……瞄准；目的在于
He aimed the gun at the enemy officer.
Now some English materials are not aimed at the pre-school children well, because they are too thick and heavy to carry.
4. be well worth…很值得……
This English film is well worth seeing in spite of its long time.
比较：这本书很值得读。

The book is worth reading.
The book is worthy of being read.
The book is worthy to be read.
It is worthwhile reading the book.
It is worthwhile to read the book.
5. stay up不睡觉；熬夜；挺立着
You will go to sch ool tomorrow, so I don’t want you to stay up too late.
相关短词：
stay the course 坚持到底
stay away from sth.远离某处
stay on 留下来继续（学习、工作）
6. run out of用完
At the end of the trip, we run out of food and water.
Unluckily, time run out before we could score in the football match.
7. by chance偶然地；非故意地= by accident
反义短语：by intention = on purpose
One may make a mistake by chance but one can’t make mistakes all his life.
相关短语：miss a chance of doing sth./to do sth.错过做某事的机会
take a chance冒险
take one’s chance 碰运气
8. be /become/get addicted to (doing) sth.对……成瘾，对……入迷
Some students are so addicted to cigarettes that they even hurriedly smoke one during the classbreak in the washing room.
9. be/become/get accustomed to (doing) sth. = be/get/become used to (doing) sth.习惯于……You’ll soon get accustomed to the custom here.
10. due to由于……；应归于要……
This basketball team’s success was largely due to Yao Ming’s efforts.
近义短语：because of , owing to , as a result of, thanks to
11. get into陷入；染上（坏习惯）
You should get into the habit of saving the document you are working on every ten minutes.
相关短语：get into trouble陷入困境；get oneself into a real state焦虑不安
12. come about 发生
No one knew how the accident had come about.
近义短语：happen, occur, take place, break out(战争，疾病)
相关短语：come across偶然遇到；碰到
come along 进展；进行
come out公开；出版；恢复知觉
come up with想出
13. result in导致（引起某种后果）= lead to
result from由……造成（由于某种原因而产生）
His carelessness resulted in his failure.
His failure resulted from his carelessness.
相关短语：as a result of因为……
with the result that…在……的影响下
without result毫无结果地
14. make a difference有关系；有影响
It will make a difference whether he comes here or not.
相关短语：make no difference没有任何关系
Make not much difference 没有太大的关系
相关句型：There is a difference between A and B.
15. protect sb./sth. from/against (doing) sth. 保护……免受……
The school should protect the pupils from the violence.
区别：prevent/stop/keep sth. from (doing) s th…阻止某人干……
16. be about to do…when… 某人正要……突然……
I was about to start out when the telephone rang.（when是并列连词，连接两个并列句）
区别：be about to do 表示更近的将来,不能与将来的时间状语连用
be to do 某人即将……，强调人的意志、计划或安排
be going to do 打算、将要，指未来的动作
17. vary from …to…由……到……多样化，随……而变化
Teaching methods vary greatly from teacher to teacher.
近义短语：vary between A and B A与B之间不同
vary in sth.在形状、大小等方面不同；vary with随……而变化
三. 其它短语回顾：
in the flesh活着的；本人
take it easy轻松；不紧张；从容
make up of（多用于被动）构成
to one’s joy令人高兴的是……
tease sb. = make fun of sb.= play a joke/trick on sb.开某人玩笑
physical and mental health身心健康decide on sth.对……作出决定
in spite of=despite不顾；不管
feel like doing sth. =want to do sth.想要（做）……
stand for代表；支持
compare to和……比较；把……比喻成
build up建立；增加；增进keep on 继续
on the whole大体上；基本上put up with=stand=bear忍受；容忍
so/as long as 只要and so on 等等
burn to the ground全部焚毁make one’s way前往；慢慢地成功
make an effort=make every effort = make efforts努力=try one’s best
四. 语法知识归纳：
（一）虚拟语气规则与重点例句
1. 由if引导的非真实条件句
a. 同现在事实相反的假设。

If they were here, they would help you.
b. 表示与过去事实相反的假设。

If he had come yesterday, I should / would have told him about it.
c. 表示对将来的假想
If you succeeded, everything would be all right.
If you should succeed, everything would be all right.
If you were to succeed, everything would be all right.
注意1：混合条件句
If it had rained last night (过去), it would be very cold today (现在).
注意2：if引导的虚拟条件句的倒装
虚拟条件句的从句部分如果含有were, should, 或had, 可将if省略，再把were, should 或had 移到从句句首，实行倒装。

Were they here now, they could help us.=If they were here now, they could help us.
Had you come earlier, you would have met him=If you had come earlier, you would have met him.
Should it rain, the crops would be saved.=Were it to rain, the crops would be saved.
2. wish的用法
I wish I were as tall as you.我希望和你一样高。

He wished he hadn’t said that. 他希望他没讲那样的话。

I wish it would rain tomorrow. 我希望明天下雨就好了。

3. 在表示命令、建议、要求等一类动词后面的从句中的应用
order, suggest, propose, require, demand, request, insist, command, insist + (should) do
I suggest that we (should) hold a meeting next week.
He insisted that he (should ) be sent there.
注意：如suggest, insist不表示“建议”或“坚持要某人做某事时”，即它们用于其本意“暗示、表明”、“坚持认为”时，宾语从句用陈述语气。

The guard at gate insisted that everybody obey the rules.
判断改错：
（错）You pale face suggests that you (should) be ill.
(对)Your pale face suggests that you are ill.
(错)I insisted that you ( should) be wrong.
(对)I insisted that you were wrong.
4. 在表语从句，同位语从句中的应用
在suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。

My idea is that we (should) get more people to attend the conference.
I make a proposal that we (should) hold a meeting next week.
5. It is demanded / necessary / a pity + that…结构中的主语从句的谓语动词要用should 加动词原形，should 可省略。

It is suggested that we (should) hold a meeting next week.
It is necessary that he (should) come to our meeting tomorrow.
6. 比较if only与only if
only if表示“只有”；if only则表示“如果……就好了”。

If only也可用于陈述语气。

I wake up only if the alarm clock rings. 只有闹钟响了，我才会醒。

If only the alarm clock had rung.当时闹钟响了，就好了。

7. It is (high) time that
It is (high) time that 后面的从句谓语动词要用过去式或用should加动词原形，但should 不可省略。

It is time that the children went to bed. =It is high time that the children should go to bed. 8. need“不必做”和“本不该做”
didn’t need to do表示：过去不必做某事, 事实上也没做。

needn’t have done表示：过去不必做某事, 但事实上做了。

John went to the station with the car to meet Mary, so she needn’t have walked back home.
约翰开车去车站接玛丽，所以她本不必步行回家了。

(Mary步行回家)
（二）强调句的判断与用法：（注意：强调句型中去掉It is/was...that仍然是完整的句子。

）
1. It is/was +被强调部分+that +句子的其它成分。

I met him in the street this morning.
It was I who met him in the street this morning.(强调主语)
It was him that I met in the street this morning.(强调宾语)
It was in the street that I met him this morning.(强调地点状语)
It was this morning that I met him in the street.(强调时间状语)
2. 疑问句的强调句
Was it in the classroom that the meeting was held?
Who was it that broke the vase?
3. not until的强调句
It was not until she took off her glasses that we realized her.
4. 比较：It was 7 o’clock that I arrived. (定从)
It was at 7 o’clock when I arrived.（强调句）
It is true that he is honest.(主从)
（三）-ing形式作状语的用法小结：-ing形式作状语,可以表示时间、原因、结果、条件、让步、行为方式、伴随状况等。

如:
Being a teacher, you should help your students in every way.(原因)
He died from a sudden traffic accident, leaving the experiment half-done (so that he left the experiment half-done).(结果)
Seeing my parents waving in the crowd, I went running to them.(时间;方式)
The students entered the classroom, following their English teacher.(伴随)
Listening to English every day (If you listen to English every day), you’ll le arn it well step by step. (条件)
【模拟试题】
一. 单选及填空题
1.Your first speech will _____ you students deeply when you begin a new class.
A. teach
B. impress
C. be given
D. say
2. The team of tourists _______ to live through the desert, one female hurt.
A. try
B. managed
C. persuaded
D. required
3. I’ll telephone you ______ I see her.
A. at a glance that
B. glance at
C. stare at
D. glare at
4. —Mr. Li’s lecture was _______.
—But it was a pity that I missed it.
A. worth listening
B. worthy listening
C. worth listening to
D. worthy to listen to
5. He is _____ now. To help him is a ______ that I’m afford it.
A. in danger; \
B. in danger; risk
C. dangerous; risk
D. dangerous; take a risk
6. The water level of the river has increased ______ half a meter since it began to rain 7 days ago.
A. on
B. for
C. in
D. by
7. The bikes driven by electricity _____ in colors, sizes and forms.
A. vary
B. different
C. various
D. all kinds of
8.The forest fire was finally put out _____ 10,000 soldiers’ effort.
A. away from
B. because
C. resulting in
D. due to
9. The winter vacation is coming. What would you _______ doing?
A. like to
B. feel like
C. preferred to
D. feel
10. ______ other boys, this is the most diligent one.
A. Compare to
B. Compare with
C. Compared to
D. Comparing
11. One can be easily _____ smoking in a smoking family.
A. addicted to
B. get in the habit of
C. found
D. interesting to
12. Forty-five students ______ a class is the proper number according to a study in the U.S., published in a magazine last month.
A. makes up of
B. making up of
C. made of
D. making up
13. You may keep this book for a month, _______ you don’t have it lost.
A. as well as
B. as well
C. as long as
D. as far as
14. A teacher’s too long speech can make the students’ patience______.
A. to run out of
B. to run out
C. run out
D. run out of
15. If it _____ not for the water, the plants_______ live.
A. were; would not
B. is ; could not;
C. were; could
D. didn’t; would
16. _______ to me, John would not have failed.
A. If he has listened
B. Had he listened
C. If he listened
D. Should he have listened
17. I wish he _______(pass) the entrance examinations last summer.
18. If I ______(be) you, I should accept his help.
19. He suggested that the doctor ___________(send for) at once.
20. ______ he _______ (be) more careful, he would not have made so many spelling mistakes.
21. _____ is a fact that he has gone to Canada for his holiday.
A. There
B. This
C. That
D. It
22. ______ was last winter ______ I met Jane in New York.
A. That; that
B. It; that
C. That; when
D. It; when
23. The baby was crying. His mother found _____ hard to make him calm down.
A. her
B. this
C. that
D. it
24. It was ______ discovered the secret first.
A. I who
B. me that
C. myself that
D. myself who
25. ______(walk) along the street, I met an old friend of mine.
26._______________(bit)by a snake, she was frightened at it.
二. 语法填空阅读下面短文, 根据上下文填入适当的词语, 或使用括号中的词语的适当形式填空。

If we want to finish anything in life, let us not forget that we must persevere（坚持不懈）. If we want to learn 1 lessons well in school, we must be hard- working and not give up ___2___ we come to anything difficult. We shall find many of our lessons very hard, 3 let us consider that the harder they are, 4 better they will do to us if we persevere and learn them thoroughly.
But there are some 5 us who are ready to give up when they come to a hard example in
mathematics, and say, “I can’t do this.” 6 never will succeed forever if they feel so. Let us remember that we shall meet with many 7 all through life. If we keep on 8 (try), we shall be sure to conquer and overcome every difficulty we meet with.
And 9 we master our lessons well in school, it will prepare us to overcome the difficult things 10 we shall meet in life when our school days are over.
三. 信息匹配：下面是几篇有关户外运动的信息，请阅读下列资料和相关信息，并按照要求匹配信息。

首先，请阅读下列有关户外活动的资料介绍：
a. Baja offers you exceptional scuba diving, snorkeling, kayaking, and sportfishing. While it the most water- based trip by far, it still offers you some amazing biking and hiking amongst the surrounding hills, not to mention delicious Mexican cuisine.
b. Immerse yourself in the natural and cultural abundance of Cape Cod by alternating days of biking the scenic Cape Cod Rail Trail with leisurely days spent on the water kayaking, whale watching, and cruising to Nantucket Island. You’ll also get to enjoy the region’s finest fare.
c. Explore one of the most beautiful national parks in the United States! Our Death Valley adventure offers you an array of spectacular vantage points for the park’s more than 3.3 million acres of dramatic desert scenery, rare desert wildlife, and unique historical and cultural sites. You can spend your days hiking and stunning desert canyons.
d. We also host social events and participate in community activities and charitable events. Club activities are mostly in the Redding, Mt. Lassen, and Mt. Shasta areas? But, we also put on out- of - town, multi - day events that involve travel to the Coast, Oregon, Vancouver Island, British Columbia, and Utah.
e. Join thousands of runners on November 5th for the 5th Anniversary of the Original US Half Marathon, San Francisco. Meet us on Historic Muni Pier for this flagship event across the Golden Gate Bridge!
f. On October 21, 1,700 of the world’s best athletes will race on the lava fields of Kona, Hawaii at the Ford Ironman World Championship. Ten of these athletes will be CEOs that qualified at various Ironman races around the world for the right to compete for the title of Fittest CEO’.
请阅读以下运动爱好者的信息，然后匹配参与者和他/ 她拟要参与的项目:
1. Beckham, a gentleman with wide interests, has been to a number of places of interest but never has he been to a real desert.
2. Rodecia, also a sports lover, is a disabled young man. But he spends his time watching, reading or talking about events of close competitions.
3. Bobage, who often goes in for world traveling and mountain climbing, is now planning to start out again.
4. Webster, a strongly- built young man, is interested in all kinds of sports. He is especially crazy about outdoor adventure and water sports.
5. Maria, a girl full of energy, is both a sports lover and a wildlife lover who has a special interest in the sea.
参与者项目
1. Beckham A. water lover paradise
2. Rodecia B. Cape Cod
3. Bobage C. Death Valley
4. Webster D. Club activities
5. Maria E. US Half Marathon
F. Ironman World Championship
四. 读写任务：阅读下面的短文, 然后按照要求写一篇150 词左右的英语短文。

June 27, 2000, is the 120th anniversary of the birth of Helen Keller, and each year the week in which her birthday falls is recognized as Deaf—Blind Awareness Week. In honor of Helen Keller —and other members of the deaf- blind community, this week is dedicated to the deaf- blind. Every year the last week of June is devoted to one thing—recognition of the deaf- blind people in our midst.
While the purpose of Deaf- Blind Awareness Week is to pay homage to Helen Keller, the deaf- blind woman who was born that week, the week focuses on increasing public awareness and understanding of deaf- blindness. According to the Helen Keller National Center (HKNC), about 70,000 people have hearing and vision loss. More than a decade ago, Deaf- Blind Awareness Week became an event officially recognized by the Federal government.
The story of Helen Keller is well known. Born on June 27, 1880, the healthy infant was developing normally. But at the age of 19 months, an illness left her deaf and blind. When Helen was six, her equally famous teacher, Anne Sullivan, was able to teach her to communicate. Helen Keller went on to excel in all aspects of her life: graduating from college with honors and writing, lecturing, and inspiring people worldwide.
[写作内容]
1. 概括短文的内容要点, 该部分的字数大约30词;
2. 就“关心残疾人”这个主题发表你的看法，至少包含以下的内容要点，该部分大约120词：（a）以你认识或了解的残疾人为例，简述残疾人面临的困难及其取得的成就；（b）举例说明人们是怎样关心和帮助残疾人的，还存在哪些不足之处；（c）呼吁大家都来关心和帮助残疾人。

【试题答案】
一. 单选及填空题
1. B sth impress sb.意为“某事物给某人留下深刻的印象”。

2. B manage to do sth.意为“排除困难，设法干成了某事”。

3. A at a glance that…意为“一看到……就……”。

4.C 考查worth与worthy的区别，worth doing , worthy of being done, worthy to be done都是值得做
5. B in danger意为“处于危险中”=at risk，take a risk意为“采取冒险行动”。

6. D 介词by引起的短语表示数量的增减程度。

7. A vary 意为“多样化”，是动词，作谓语
8. D due to意为“由于，归功于”，介词结构作表语
9. B feel like doing意为“想要做某事”
10. C compared to是过去分词作状语，意为“某人/物被与其他人/物相比较”。

11. A sb. is addicted to (doing) sth.意为“某人迷上某物”
12. B making up of意为“组成”，现在分词作定语，相应于一个定语从句who make up of a class
13. C as long as意为“只要”，后接条件状语从句；as well as意为“也，还”；as far as意为“就……而言”
14. C run out意为“用尽，没有了”，其主语是事物，此处用省略to 的不定式作宾语补足语；run out of的主语是人，宾语是事物。

15. A if引导的非真实条件句，与现在事实相反，从句用一般过去式，主句用would/should/could/might + do
16. B if引导的非真实条件句，与过去事实相反，从句用过去完成式，主句would/should/could/might + have done; 此句是虚拟倒装句
17. had passed
18. were
19. (should) be sent for
20. Had been
21. D 此句是it作形式主语
22. B此句是it is/was +被强调部分+that+句子其它部分
23. D find/make/think/consider it +adj/ n.+to do sth…。

it是形式宾语
24. A 强调主语
25. Walking
26. Having been bitten
二. 语法填空：本篇短文讲述的是：如果我们一生中想成就什么事业，就必须在做任何事情的时候要有毅力，要克服种种困难，才能成功。

1. our 在名词lessons 前面要加限定词。

2. whenever 句意是“无论什么时候遇到困难，都不要放弃”。

3. but 前后是转折语气。

4. the 表示“越……就越……”是“the+比较级，the+比较级”句型。

5. among 应当指“我们中的一些人”。

6. They 作主语应是名词或代词，替代some among us 用They。

7. difficulties 由上下文可知，由many 可知是复数，指困难的事。

8. trying 表示不断地做或反复做某事，用keep on doing。

9. if 前后是条件与结果的关系。

10. that/which 先行词是事，用关系代词which/that。

三. 信息匹配：运动爱好者与拟要参加的户外活动项目
1. C 对应的关键信息词是a real desert 与dramatic desert scenery，rare desert wildlife。

2. F 对应的关键信息词是petitions与the Ford Ironman World Championship。

3. D 对应的关键信息词是mountain climbing 与Mt. Lassen，and Mt. Shasta areas。

(Mt.是mount 的缩写，意为“山，峰”)
4. A 对应的关键信息词是water sports与diving。

5. B 对应的关键信息词是wildlife lover，sports lover，the sea 与natural，alternating days of biking，whale watching。

四. 任务型写作：参考范文(One possible version)
Deaf- Blind Awareness Week is to pay homage to Helen Keller to increase public awareness and understanding of deaf- blindness. Helen Keller was deaf and blind but was able to graduate from college with honors and writing，lecturing，and inspiring people worldwide.
As is known，disabled people have to overcome much more difficulties than non- disabled people. Zhang Haidi who has been unable to walk since she was five，never went to school，but has studied politics，literature，medical science and several foreign languages. She also talks to other disabled in the Internet，giving them encouragement to succeed in their own lives.
Nowadays more and more people are concerned about the disabled by encouraging them to strive for success，helping them with their study and work，and so on. But many disabled people are still looked down upon，who can’t get jobs just owing to their disabil ities.
Let’s accept the disabled as they are and give them encouragement to live as rich and full a life as we do!
【励志故事】
离职
A对B说：“我要离开这个公司。

我恨这个公司！”
B建议道：“我举双手赞成你报复！！破公司一定要给它点颜色看看。

不过你现在离开，还不是最好的时机。

”
A问：？？？
B说：“如果你现在走，公司的损失并不大。

你应该趁着在公司的机会，拼命去为自己拉一些客户，成为公司独挡一面的人物，然后带着这些客户突然离开公司，公司才会受到重大损失，非常被动。

”
A觉得B说的非常在理。

于是努力工作，事遂所愿，半年多的努力工作后，他有了许多的忠实客户。

再见面时B问A：“现在是时机了，要跳赶快行动哦！”
A淡然笑道：“老总跟我长谈过，准备升我做总经理助理，我暂时没有离开的打算了。

”
其实这也正是B的初衷。

一个人的工作，永远只是为自己的简历。

只有付出大于得到，让老板真正看到你的能力大于位置，才会给你更多的机会替他创造更多利润。