问题 单项选择题

严重贫血患儿(血红蛋白38g/L)发生呼吸道疾患,PaO40mmHg,以下哪一项症状是正确的()

A.不会发生心动过速

B.不会发生发绀

C.不会发生贫血表现(面色苍白等)

D.发生发绀

E.不会出现心脏杂音

答案

参考答案:B

解析:当毛细血管血液中的还原血红蛋白超过50g/L(5/dl)时,致皮肤、黏膜呈青紫颜色,出现发绀。但在重度贫血患者,如血液中血红蛋白量低于50g/L时,即使全部变为还原血红蛋白也不致引起发绀。

阅读理解

I’m sure many of you have seen Star Wars, Jurassic Park, Multiplicity, or many of the other movies that describe cloning. Most of what you see in these movies is false. What you don’t know is that cloning could be dangerous, to the clone and to our society as a whole. I think human cloning is wrong mainly for four reasons.

What about identity? Humans are promised the right to their own personalities. What would happen if we ignore those rights by giving them someone else’s genetic identity? True, Cloning may prevent people from possessing their identities.

Also, these is a large power struggle here. Cloning means a degree of power and controls over another person’s physical identity and that ignores their rights and their only personalities. The person doing the cloning would have more power than any parent would have.

Cloning would also deal with killing embryos (胚胎). You might not have known, but Dolly, the sheep that was cloned in 1996, was one of over 200 sheep embryos and hers was the only embryo that survived. The rest died or were thrown away. Imagine if the failure rate was that high when we started to clone humans. cloning means running the risk of wasting too much effort

Cloning someone, at this present time, would be extremely dangerous to the birth mother and the clone. In studies done on cows, 4 out of 12 birth mothers died. There is a very high failure rate, which is shown in the cloning of Dolly. Even if you had a few good embryos, failures have been noticeable in animal tests.

So, should we work ahead in the world of cloning? I say no. the risks are greater than the benefits. It’s dangerous to the clone and to the birth mother. We would be killing human lives in the process. It would also be a violation(侵害) of the clone’s right to its own genetic identity and personality.

小题1:The author thinks human cloning is wrong mainly for ______ reasons.

A.4

B.3

C. 2

D.5小题2:According to the article, what is the author’s opinion about identity?

A.Cloning itself gives parents great power over identity.

B.People’s identity is completely determined by their genes.

C.Government has the rights to confirm people’s identities.

D.Cloning may prevent people from possessing their identities.小题3:According to Paragraph 4 ,which is right ?      ____.

A.human cloning is much more difficult than animal cloning

B.there are 200 sheep successfully cloned.

C.cloning means running the risk of wasting too much effort

D.numbers of baby animals are likely to be created by cloning小题4:Why does the author mention some movies in the first paragraph?

A.To introduce the topic of the article.

B.To present his idea about the movies.

C.To state the conclusion first.

D.To make the article unusual.小题5: What is the best title of the passage?

A.What Is Human Cloning

B.Human Cloning Is Wrong

C.How Does Human Cloning Happen

D.Discussion On Human Cloning

判断题