英语周报332022答案

语篇导读】文章主要介绍了曼哈顿人把废弃的高架铁路改造成速人的空中公园的故事。作者运用对比的手法描迷了 High Line过去和现在的样子,并借两位市民之口讲述了促成 High Line改造事宜的经过。(D)28. What does the underlined word"That"in Paragraph 2 refer to?A. An urban oasisB. A raised rail【解析】篇章结构题。由第一段的描迷和下一句紧接着的转折可知,看起来像“废弃的遗留物”这是 High LineC. A black steel structureD. An abandoned leftover过去的样子,故选D项。(D)29. What does the author notice while walking on the High Line?A. He can always see strange thingsB. The weather seems much better thereC. New buildings keep being built around itD. He can cover more miles in the same amount of time.解析】细节理解题。由第二段中的 without streets to cross or traffic lights to wait for, ten blocks pass asquickly as two可知,困为不要过马路等候交通信号灯,在相同的时间内,作者在高架上可以走得更快A. Because heothe representative of the railroadB. Because he went there to accompany his friend DavidC. Because he wanted to see if others would share his viewsD. Because he thought he could persuade people to join in his campaign【解析】细节理解题。由第三段中的 I wondered if anyone wanted to save it:和 I went to see what was going on可知, Hammond去参加社区会议的目的是想看看有没有人和他一样想保护高架不被拆除,(D)31. How did David feel at the meetingA. He was plerealize he might sucB. He was encouraged by everyone's determinationC. He was worried that their way of life might changeD. He was surprised ly the reactions to the idea proposed【解析】细节理解题。由最后一段中的 We couldn' t believe the degree of rage those people had可知, David惊讶于那些想拆除高架的人们的愤怒情绪。

33.(10分,除标注外,每空1分)(1)(规则的)双螺旋复制起点的数量(2分)(2)第一代DNA第二代DNA(4分)(3)DNA复制是双向的(2分)(4)单【解析】(1)DNA复制开始时首先必须解旋,从而在复制起点位置形成复制叉,所以可以根据复制叉的数量推测复制起点的数量。(2)因为DNA复制为半保留复制,故复制一次所得的2个DNA分子中,一条链带放射性标记,另一条链不带。复制两次后所得的4个DNA分子中,有2个DNA分子都是其中一条链带放射性标记,另外2个DNA分子则是两条链都带放射性标记(3)由图示可以看出,该DNA分子复制是双向的。(4)由图4可知,该DNA分子有一个复制起点,即单起点复制。

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