外研版必修四Unit4知识点详析和练习(有答案)

重点单词详析：

（1）quantity

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A yield refers to quantity (e.g. of food). 产量是指（例如，事物的）数量。

【点拨】

quantity n.数量

a quantity of 许多，大量

quantities of许多，大量

in large quantities 大量地

in quantity大量地

in large amount大量地

The printing firm buys papers in quantities.那家印刷公司成批买纸。

Great quantities of fish are caught at this time every year.= A great quantity of fish is caught at this time every year.每年这个时候都捕获大量的鱼。

It was a bad year for films, in terms of both quantity and quality.

今年的电影无论从数量上还是质量上都说不上好。

a quantity of和quantities of既可修饰可数名词复数，也可修饰不可数名词；其作主语时,a quantity of+名词,谓语动词应视名词的具体情况而定,即：跟可数复数应用复数动词，跟

不可数时应用单数动词；后者用复数,即和quantity一致。

（2）type

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First, Yuan Longping experienced with different types of rice.

首先，袁隆平用不同品种的水稻进行实验。

【点拨】

type n.类型，品种；模范；样式；vt. 打字；测定（血等）类型；vi. 打字

There are various types of the disease.该疾病有各种类型。

I was rather an outdoor type.我是那种特别喜欢户外运动的人。

Like any other type of equipment it requires regular servicing.

它和其他类型的设备一样，也需要定期检修。

It is a rare blood type. 这是罕见的血型。

Could you type this letter for me?你能为我打这封信吗？

（3）experiment

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First, Yuan Longping experienced with different types of rice.

首先，袁隆平用不同品种的水稻进行实验。

【点拨】

experiment n. 试验；实验；尝试；vi.尝试；做实验，

make/carry out/do/ perform/try an experiment 做实验

experiment in做……方面的实验

experiment on/upon 在……身上做实验

experiment with 以……做试验

be proved by experiment 用实验证明

The researchers are repeating the experiment on rats.研究人员用老鼠反覆做该试验。

Don't experiment with such dangerous drugs.不要用这种危险的药物做实验。

He argued that the experiment could be done in another way.

他论证说这项实验可以换一种方法进行。

【拓展】

experimental adj. 试验的，实验的

experimenter n. 实验者

experience n. 经历

（4）escape

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The Chinese discovered that the gas escaping from the tube could lift it into the air.

中国人发现从竹筒里漏出的气体可以使其飞向空中。

【点拨】

escape n.& v.逃跑;逃脱;逃避，后常接动名词作宾语。

make one's escape 逃跑

have a narrow escape九死一生

a fire escape紧急出口;安全门

have one's escape cut off被切断逃路

escape (doing) sth.逃某事

escape from (out of)+sp. 从……逃脱/逃走

escape from reality 逃避现实

The party was boring—we couldn't wait to make our escape.聚会很无聊，我们迫不及待地要溜走。Four prisoners who escaped from the jail have been caught.从监狱逃出的四名罪犯已经被抓住。The dog escaped through/from the back window of the bus.狗从公共汽车的后窗逃走了。

【拓展】escape, escape from, flee三者都含有“逃,逃跑”的意思,但侧重点有所不同。escape强调“逃避，逃脱(不愉快的事)”,含有成功逃脱的意味,这个意义不用被动式。

escape from指“从(监禁,管制中)逃脱,逃走”或是指“(气体,液体等)漏出,泄漏”，也含有成功

逃脱的意味。

elee“逃离”，不暗示逃跑的结果成功与否。

clear ）5（．

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