问题 单项选择题

Questions 1-4

How had the man put on his pullover according to the woman?()

A.Upside down and inside out.

B.Inside out and back to front.

C.With its sleeves as trouser legs.

D.With its pattern upside down.

答案

参考答案:B

解析:

[听力原文]1-4 Man: Hi, Helen. Any phone call for me while I’m away?

Woman: No, Bill. What did you get from your lunch-break shopping?

Man: I’ve got this new pullover, but I m not sure if it really suits me. What do you think of it, Helen?

Woman: Well, it’s very nice as far as I can see, but put it on first. Then I’ll tell you if it suits you. No hurry. We still have about half an hour to go before our office time.

Man: I tried on about a dozen. This one isn’t what I wanted really.

Woman: Why did you buy it then?

Man: The salesman sold it to me before I realized what had happened. He just never stopped talking and he told me some story about the latest fashion and special reductions. Before I could say anything, he’d wrapped it up and taken my money.

Woman: Well, it doesn’t look too bad. But haven’t you put it on inside out and back to front?

Man: Inside out and back to front Well, I can’t tell the back from the front with these high-neck pullovers. I really wanted one with a V-neck.

Woman: It’s a good thing it’s got sleeves at the top or you’d put it on upside down as well. Still, I think it suits you quite well.

Man: I went out to get a blue pullover with a V-neck, short sleeves and a pattern and I came back with a white one with a high neck, long sleeves and no pattern.

Woman: You must be too easy to take in. You’ve got to learn to stand up to these high pressure salesmen. They’ll sell you all sorts of things you don’t want if you don’t watch out.

Man: Next time I’ll send my wife. She’ll probably sell something to the salesman.

单项选择题

有科学家认为,由父母选择基因“组合”下一代的时代已快来临了。在“组合”未来的“非常婴儿”方面,父母们面对的是一道多项选择题,他们可以选择让婴儿能抵抗常见疾病和感染的基因,这样婴儿不会害怕癌症、心脏病等;父母让孩子的个子长高一点、头发浓密一点也并非难事。 

在美国的普林斯顿,科学家们成功地利用基因改善了老鼠的大脑功能,经过“加工”的老鼠比其他普通老鼠明显聪明得多。这种神奇的效果来自于从外界植入老鼠体内的一种基因,这种基因产生名为NR2B的化学物质。人脑当然比老鼠的大脑复杂得多,但它们的工作原理实际上是一样的。 

至于说到为孩子选择人格与个性,实也不是匪夷所思的专家相信,个人个性的特点中至少有一半是由基因的特性决定的。 

科学家打算将来自不同个体的基因――比如聪明一些的和迟钝一些的,好看的和普通的――混合在一起进行研究,以便了解为什么人们会在力量、耐力、敏捷性等方面有差异。当这些主管天赋与性格的基因的奥秘解开之后,未来的父母就离“设计”自己的孩子又近了一步。但技术上的难题是,人为注入的基因大部分都是人体内自有的,因此如何确保这些外来基因能发挥作用,取代原来的基因是个关键。 

有专家对基因工程能否如人们所认为的那样大步向前跃进持怀疑态度,因为在基因和染色体的世界里,随机性因素很多,基因一旦站错了队,不仅不能发挥出人们预先估计的作用,反而会给别的重要基因带来影响,甚至破坏它们。 

要想给人的自然基因“升级”,只有通过“人造染色体”,可是人的染色体数目的标准是23对,加进人造染色体后,就必然引起染色体数量上的变化。如果未来人类还遵循有性繁殖规律的话,这些多出来的染色体还会传给下一代,这会带来什么后果多出来的染色体怎么办就是世界一流的科学家现在也无法对这些问题做出明确回答。

在“组合”未来的“非常婴儿”方面,父母们面对着多种选择,下列各项不属于其选择内容的一项是()。

A.健康

B.外形

C.记忆

D.个性

问答题 简答题