人教新目标八年级下册七单元SectionB单词详解(20200519174410)

Unit 7 What’s the highest mountain in the world?

Section B 单词详解

1.cm(centimeter)厘米

It's 20 cm thick. 它有20厘米厚。

2.weigh v. 称……的重量→ weight n. 重量,不可数

用作连系动词，意为：重量是……，

对重量提问，常用How much do /does did…weight?或How heavy…？

He weights sixty kilos.他体重60千克。

How much does it weigh？它的重量是多少？

put on weigh 增重

What's the weight of the ship？这只羊的重量是多少？

She weighs herself every day and wants to lose weight.

她每天都给自己称重，想减肥。

The elephant weights many times more than this panda.

这头大象的重量是这只熊猫的很多倍。

time ①“是......的几倍”

主语+ 数词+ times + as +形容词+ as +被比较的内容

Our new school is four times as big as the old one.

我们的新学校是旧学校的四倍。

②“次数”　一次once 两次twice

三次及三次以上：基数词+ times

three times 三次three or four times 三到四次

many times 很多倍last time (在)上次……时

every time 每次/每回……　each time 每当……时

the first time 第一次……时next time (当)下次……时

3.birth n. 出生；出身；

at birth出生时（用作时间状语）,相当于when was /were born，其中birth用做不可数名词,意为：出生，诞生

At birth，the baby was about three kilos. 出生时，这个婴儿大约三千克重。

Do you know the date of his birth？你知道她的生日吗？

4.up to高达up to +数量词达到（某数量、程度等）；至多

I can take up to four people in my car.我的小汽车里可以容纳4个人。

up to now 直到（现在）

Up to now , Tony has been very quiet.

由某人决定”

be up to sb. “

— Shall we go out or stay in ? — It’s up to you.

A panda can live up to 20 to 30 years. 一只熊猫活20年到30 年。

5.adult adj. 成年的；成人的n.成人；成年动物

An adult panda weighs many times more than a baby panda .

一只成年大熊猫的重量是一只大熊猫宝宝的许多倍。

human n 人；人类No human could live like this .没有人能这样生活。

6.bamboo n. 竹子,不可数名词bamboos表示种类。

The house is made of bamboo.

There are bamboos growing in the mountain. 山里生长着各种各样的竹子

濒危的”，表示濒临灭绝

7.endangered adj. “

Why are pandas endangered? 为什么大熊猫濒临灭绝？

危险的”，表示给他人或他物带来危险。

dangerous adj. “

Snakes are dangerous animals. 蛇是危险的动物。

危险”，in danger, 处于危险中

danger n. “

Pandas used to be in danger.熊猫曾经处于危险境地。

8.research ，通常用作不可数名词，也可用作可数名词,意为“研究；调查”，常与动词do ，make，carry out等连用构成动词短语，表示“做或进行研究工作”，其后可接介词on，into等引出研究的内容。

The research shows that napping for about an hour is the best.

研究表明小数一个小时是最好的。

I'm doing some research on Chinese history. 我正在研究中国历史。research，还可以用作不及物动词，意为“研究；调查”后常接介词into，表示“对……进行研究”。

They are researching into the causes of cancer.他们正在研究癌症的起因。

9.keeper n. 可数，监护人；饲养员；看守人；管理人

Her father was a keeper of the lighthouse. 她爸爸是灯塔守护者。

10. awake adj. 醒来（反义词）asleep 睡着的

She was awake all night.

V. 唤醒；使醒来= wake up The noise awake me.

He fell asleep early last night, and he was awake early this morning.