C.effect of A with B

D.effect of A in B

正确答案：effect of A on B

第三章单元测试

1、科技英语摘要中使用频率最高的时态是

A.一般过去时

B.一般将来时

C.一般现在时

D.现在完成时

正确答案：一般现在时

2、Computers are powerful tools which perform fast， accurate calculations over huge sets of data.该句表达了一个客观情况因此使用了

A.一般过去时

B.一般现在时

C.现在完成时

D.现在进行时

正确答案：一般现在时

3、It is shown that a concentration on the preservation of routing abilities might damage the preservation of community structure， and vice versa.该句这样排列的主要原因是保持句子平衡。

A.正确

B.错误

正确答案：正确

4、The grain output of last year in our province was 20％over that of 1990.可翻译为：我们省去年的粮食产量比1990年增加20％。

A.正确

B.错误

正确答案：正确

5、The earth is 49 times the size of the moon.可以翻译为：地球是月球大小的 50倍。

A.正确

B.错误

正确答案：错误

6、Convection（对流） is a（）simpler physical process than conduction.

A.more

B.many

C.far

D.farther

正确答案：far

7、We show that a discriminatively trained， multi-layer capsule system achieves state-of-the-art performance on MNIST and is（）than a convolutional net at recognizing highly overlapping digits.

A.much well

B.well

C.more better

D.considerably better

正确答案：considerably better

第四章单元测试

1、This company was the first（）portable radios as well as cassette tape recorders in the worlD.

A.produced

B.producing

C.to produce

D.having produced

正确答案：to produce

2、The purpose of new technology is to make life easier，（）it more difficult.

A.not make

B.not to make

C.not making

D.nor to make

正确答案：not to make

3、I fell down and broke three of my teeth.I wonder how many times I have to come here and get my false teeth

A.fixed

B.to fix

C.fixing

D.fix

正确答案：fixed

4、the house on fire， he dialed 119.

A.Having seen

B.Seeing

C.Being seen

D.To see

正确答案：Seeing

5、Mark often attempts to escape（）whenever he breaks traffic regulations.

A.having been fined

B.being fined

C.to have been fined

D.to be fined

正确答案：being fined

6、It is our purpose in this section to introduce the basic meaning of the solution of a differential equation.下划线部分在句中做。