学位英语

练习：

1.Paragraph 2 A An introduction of a Toyota’s 225 horsepower V6 engine.

2.Paragraph 4 B A description of the nanomotor in terms of power and size.

3.Paragraph 5 C Surface tension.

4.Paragraph 6 D Previous inventions of nanoscale products.

E The working principle of the nanomotor.

F Possible fields of application in the future.

5.Doctors envision that the nanomotor would travel through human bodies to __________ .

6.Surface tension means the tendency of atoms or molecules to __________ .

7.Nanoconveyors could be used.to __________ .

8.Applying a small electric current causes atoms to __________ .

A remove disease

B resist separating

C shuffle between two molten metal droplets

D power nanomachines

E sop up molecules from the large droplet

F transport nanoscale objects

答案与题解：

1.分析文章标题：The Tiniest(最小的) Electric(电动的) Motor(发动机) in the World(在世界上)

文章主题词：the tiniest, electric motor

2. 分析被选项小标题：

A An introduction(引入， 介绍) of a Toyota(丰田汽车)’s 225 horsepower (马力)V6 engine(发动机)(motor的近义词).

B A description(描述) of the nanomotor(纳米发动机

) in terms of (在...方面)power(动力， 权力) and size(大小，尺寸).

C Surface tension(表面张力).

D Previous(以前的， 早先的) inventions(发明) of nanoscale(纳米级的) products(产品).

E The working principle (工作原理)of the nanomotor(纳米发动机).

F Possible(可能的) fields(领域， 天地， 运动场) of application(运用) in the future(将来).

分析：A， B， D和E与文章主题相关， 因此成为答案可能性较大， 而C和F初看起来偏离文章主题，因此成为答案的可能较小。

3.解答概括大意题

A. An introduction(引入， 介绍) of a Toyota(丰田汽车)’s 225 horsepower (马力)V6 engine(发动机)(motor的近义词).

B. A description(描述) of the nanomotor(纳米发动机

) in terms of (在...方面)power(动力， 权力) and size(大小，尺寸).

C. Surface tension紧张(状态), 拉紧, 张力(表面张力).

D. Previous(以前的， 早先的) inventions(发明) of nanoscale(纳米级的) products(产品).

E. The working principle (工作原理)of the nanomotor(纳米发动机). F. Possible(可能的) fields(领域， 天地， 运动场) of application(运用) in the future(将来).

1. Paragraph 2 ____.

(第1段)Scientists recently made public the tiniest electric motor ever built. You could stuff hundreds of them into the period at the end of this sentence. One day a similar(相似的) engine(发动机)might power a tiny mechanical doctor that would travel through your body to remove your disease.

(第2段)The motor works by shuffling(来回移动) atoms(原子) between(在...之间) two molten(熔化的) metal(金属) droplets (小滴) in a carbon(碳) nanotube(纳米管). One droplet is even smaller than the other. When a small electric current is applied to the droplets, atoms slowly get out of the larger droplet and join the smaller one. The small droplet grows – but never gets as big as the other droplet – and eventually bumps into the large droplet. As they touch, the large droplet rapidly sops up the atoms it had previously lost. This quick shift in energy produces a power stroke.

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