2017-2018学年高中英语外研版必修1课件：Unit 5 Section 1 精品

Ⅱ.Careful-reading Read the text carefully and choose the best answer. Passage A
1．The first sentence “It is hard to think of a world without metals.” will make us think _______．
2．The table in the passage is arranged in order of ________．
A．metal kinds B．reaction activities C．values of metal D．the first letters of the words
3．An oxide is a ________． A．new kind of metals B．kind of gases C．product of the reaction D ． factor ( 因 素 ) of a chemical reaction
2．Skim passage B and write down the
main idea of each part.
(1)Part 1 (2)Part 2 (3)Part 3
Iron in dry air． Iron in air-free water． Iron in ordinary water．
Iron in dry air Method (1)Put some iron nails at the bottom of a test tube. (2)Push some cotton wool down the tube. (3)Leave the tube for one week.
Result After one week, the nails have not rusted. Conclusion Iron does not rust in dry air. Iron in air-free water
4．According to the table, which metal
is most suitable to make our daily
kitchenware (厨房)?
A．Zinc.
B．Iron.
C．Copper.
D．Magnesium.
Passage B
5．Which is NOT the apparatus (仪器)
Iron in ordinary water Method (1)Half-fill a test tube with water and add two or three clean nails. (2)Leave the tube for one week.
Result The nails rust in the tube with ordinary water. Conclusion Iron rusts in ordinary water.,
短文 A 很难想象一个没有金属的世界。不同 的金属有不同的用途，例如，钢被用在汽 车上，铁被用在电器上。使用金属时，了 解金属和不同的物质如何发生反应很重 要，如水和氧气。(不同的)金属与这些物 质的反应程度可以按顺序排列起来。这里 有一个表格，反应强烈的金属在上面，反 应微弱的在下面。
Passage A It is hard to think of a world without metals. Different metals have different uses, for example, steel is used in cars, and iron is used in electrical equipment. When we use metals, it is important to know how they react with different substances, for example, water and oxygen. The reaction of metals with these substances can be put in order. Here is a table with the metals that react most at the top, and the metals that react least at the bottom.
9．equipment
I．电
10．liquid
J．收缩
11．contract
K．漂浮
12．stage
L．混合物
答 案 ： 1 ～ 6 GHLIKC 7 ～ 12
AFEDJB
Ⅱ.Write down the meaning of phrases in
each sentence. 1．You know the first thing I thought of when I
Aim：To find out if iron rusts (a) in dry air; (b)in water that has no air in it (air-free water)；(c)in ordinary water.
Apparatus：3 clean iron nails; test tubes; test tube holder; cotton wool; oil; Bunsen burner.
[句式分析] 此句为倒装句。here 置于 句首，主语为名词，此时要将谓语动词放在 主语前构成倒装。两个 that 从句都是定语从 句，修饰前面的先行词 metals。at the top 和 at the bottom 在句中作宾补。
[尝试翻译] 这里有一个表格， 反应最 强的金属在上面， 反应最弱的在下面。
woke up? 想起；想到 2．They need to interview some people and
find out if they like their jobs. 查明
3．He had even been kept out of school during the busiest seasons.
(4)Add some oil to the water. This will keep air out of the water.
(5)Leave the tube for one week.
Result The nails do not rust in the tube with air­free water. Conclusion Iron does not rust in air­free water.
that is required in the experiment of “Iron
in dry air”？
ห้องสมุดไป่ตู้
A．Cotton wool. B．Oil.
C．Iron nails.
D．Test tube
holder.
6．Which is required as one of the
apparatus in the experiment of “Iron in ordinary water”？
7．Do you want to add your name to the list? 把……加到……
Match the following objects with their names.
A．crucible
B．beaker & glass rod
C．alcohol burner D．microscope
E．tongs F．test tube
G．balance
答案：①～⑦ EDBCFGA
Ⅰ.Fast-reading 1．Skim the passage A and write down the main idea of it. The reaction of metals with different substances.
A．metals make up the world B．metals play a greatly important role in the world C．there would be no world if there were no metals D．it is difficult for us to live in the world of metals
Ⅲ.Study-reading Analyze the difficult sentences in the text. 1．Different metals have different uses, for example, steel is used in cars, and iron is used in electrical equipment.
置身于外
4．He hurried me into putting my own house in order first. 整理
5．In conclusion, I wish this meeting every success. 最后
6．Iron reacts with water and air to produce rust. 与……发生反应
Method (1)Half-fill a test tube with water. (2)Boil the water for three minutes.(This makes sure there is no air in the water.)
(3)Put two or three clean nails in the water.
[句式分析] When we use metals 是时间 状语从句，it 为形式主语，真正的主语是后边 的动词不定式 to know how ...。
[尝试翻译] 当我们使用金属时，了解它 们与不同的物质如何反应很重要，比如，水和 氧气。
3．Here is a table with the metals that react most at the top, and the metals that react least at the bottom.
*an oxide＝another substance＋oxygen
Passage B A Simple Scientific Experiment
Below is a description of a simple scientific experiment. It shows us how iron reacts with air and with water.
Ⅰ.Match the word with its meaning.
1．conclusion A．普通的；平常的
2．react
B．阶段；时期
3．mixture
C．膨胀
4．electricity 5．float 6．expand 7．ordinary 8．boil
D．液体 E．设备；装备 F．煮；煮沸 G．结论 H．反应
[句式分析] 在该句中 for example 为 插入语，后面接的是由并列连词 and 连接的 两个简单句，其中两个简单句中“主语＋is used ...”是被动语态。
[尝试翻译] 不同的金属有不同的用 途，比如，钢材被用于汽车中，铁被用于电 器设备中。
2．When we use metals, it is important to know how they react with different substances, for example, water and oxygen.
A．Oil.
B．Cotton.
C ． Bunsen burner. D ． Test tube
holder.
7 ． The purpose of these three experiments is to find out how ________．
A．iron reacts with water and air B．important iron is C．do the experiment of iron's reaction with water and air D．to keep iron rustless 答案：1～4 BBCC 5～7 BDD