1.选择题- (共10题)
9.研究发现，神经退行性疾病与神经元中形成的R﹣loop结构有关．R﹣loop结构是一种三链RNA﹣DNA杂合片段，由于新产生的mRNA与DNA模板链形成了稳定的杂合链，导致该片段中DNA模板链的互补链只能以单链状态存在，请回答下列问题
2.单项选择- (共10题)
11.
Cattle’s two ________ help them to digest food and their fur to keep them warm.
| A．stomaches | B．heart | C．stomachs | D．hearts |
12.
—How about _______ Christmas evening party?
—I should say it was _______ success.
—I should say it was _______ success.
| A．a;a | B．the;a | C．a;不填 | D．the;不填 |
13.
Her pale face suggests that she ______ in poor health and her friends strongly suggest that she _____ a doctor.
| A．is; sees | B．be; see | C．is; see | D．be; should see |
14.
Scientists in some countries have done a lot of work to _____ the moon.
| A．cover | B．search | C．explode | D．explore |
15.
Fur coats are good means to ______ people from frost bites in cold winter.
| A．stop | B．prevent | C．protect | D．keep |
16.
John, get up! I’m afraid you won’t have time to ______ before going out.
| A．get to change | B．get changing | C．get change | D．get changed |
17.
Susan advised me not to buy the vase, but I bought it _____.
| A．anyhow | B．however | C．though | D．totally |
18.
I know these flowers are not natural, but the _____ ones look more beautiful and can last long.
| A．fresh | B．new | C．true | D．artificial |
19.
________they visited the Science Museum，they showed great interest in everything they saw.
| A．The first time | B．For the first time | C．At first | D．At the first time |
试卷分析
-
【1】题量占比
选择题:(10道)
单项选择:(10道)
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【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：6
7星难题：0
8星难题：4
9星难题：0