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【题目】(2017·北京) The little problems __________ we meet in our daily lives may be inspirations for great inventions.

A. that B. as C. where D. when

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【题目】如图是DNA片段的结构图,请据图回答下列问题

1图甲是DNA片段的______结构,图乙是DNA片段的_________结构。

2从图甲可以看出组成DNA分子的两条链的方向是______的,从图乙可以看出组成DNA分子的两条链相互缠绕成规则的_________结构。

3从图中可以看出DNA分子中的两条长链是由_______和_____交替连接的。

4连接碱基对的化学键是_________,碱基配对的方式为:A腺嘌呤一定________配对;G鸟嘌呤一定____________配对。

5填出图中部分结构的名称:[2]_______、[5]______。

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【题目】(2016·江苏) Many young people, most __________ were well-educated, headed for remote regions to chase their dreams.

A. of which B. of them

C. of whom D. of those

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【题目】(2016·浙江) Scientists have advanced many theories about why human beings cry tears, none of __________ has been proved.

A. whom B. which C. what D. that

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【题目】 He was when he lost all his money. Luckily, a kind man helped him generously.

A. desperate B. optimistic C. eager D. cautious

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【题目】(2017·浙江改编) Her friends came to her when the war broke out. Anis who owned a restaurant agreed to hide some books.

A. stop B. help C. warn D. rescue

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【题目】如图是DNA的部分结构示意图,请据图回答下列问题:横线上填名称,[]中填标号

1图中的名称是 的名称叫

2图中表示DNA基本组成单位的那个标号是[ ]。

3的各组成成分与RNA比较,一定相同的物质的标号是[ ]。

4构成DNA分子的基本骨架的组成成分在图中的标号是[ ]。

5以图中DNA片段的左链为模板,合成信使RNA的过程称为 ,所合成的信使RNA片段从上到下的碱基依次是

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【题目】China’s economy is sure to develop very quickly ________ the new government is able to work scientifically

and practically.

A. even though B. in case

C. as though D. in that

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【题目】

--- There is a story here in the paper about a 110-year-old man.

--- My goodness! I cant imagine that old.

A. to being

B. to have been

C. being

D. having been

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【题目】(2017·天津) My eldest son, ___________ work takes him all over the world, is in New York at the moment.

A. that B. whose C. his D. who

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