题干

我国科学家成功地将人的抗病毒干扰素基因转移到烟草DNA分子上,从而使烟草获得了抗病毒的能力。这项技术所依据的遗传学原理主要是

A:碱基的互补配对原则

B:中心法则

C:基因分离定律

D:基因自由组合定律

上一题 下一题 0.0难度 选择题 更新时间:2012-02-27 10:52:52

答案(点此获取答案解析)

B

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    There's a song by the great Jamaican singer Bob Marley called So Much Trouble In The World. Marley understood that part of the reason why there are so many problems in the world is the lack of tolerance between people. The UN understands this too––– that's why it made Nov 16th “International Day for Tolerance”.

    But first of all, what is tolerance? According to French philosopher Voltaire, tolerance is the consequence of humanity. We are all formed of frailty (脆弱) and error; let us pardon each other's fool––– that is the first law of nature.”

    Very often, people don't realize that they're intolerant. This is because intolerance has a lot to do with ignorance. For example, the UN's campaign is in part about the treatment of females by males. But often, the behavior of men toward women is intolerant because men don't put themselves in the shoes of women.

    It's worth thinking a little about the words “tolerance” and “intolerance”. Are they the best words to describe the evils of which we're speaking here? To agree to be “tolerant” of someone isn't necessarily a very respectful thing. When someone is tolerated, it implies that there's something wrong with them.

    Still, what Voltaire said stands: We humans are not perfect and this weakness is something that we all share. That's the reason we should be tolerant. It's a little like generosity. We can give things to another person, and we can also give our forgiveness.