英語考試閱讀理解輔導(dǎo)試題及答案

1、第 第 頁英語考試閱讀理解輔導(dǎo)試題及答案Henry III didnt know much about biology. He went through si* wives back in the 1500s, looking for one whocould bear him a son. Scientists now know that its the fathers sperm, not the mothers egg, which determines whether a baby is a boy or a girl. And last week researchers at the

2、 Genetics and IVF Institute, a private fertility(生育技能)center in Virginia, announced a new technique that will allow parents to choose the se* of their baby-to-be, before it has even been conceived. The scientist used a tiny laser detector to measure the DNA in millions of sperm cells as they pass si

3、ngle file through a narrow tube, like cattle being herded through a corral(牲口欄). In a study published last week, girl sperm, which has more DNAthe genetic material in each cell, was collected, while boy sperm was discarded. And when purified girl sperm was used to impregnate(使受孕)a group of mothers,

4、15 of 17 resulting babies turned out to be girls.The researchers say that se* selection can also double a mothers chance of having a son and can be usedto avoid genetic diseases that affect only one gender, such as hemophilia(血友病). But some e*perts, like New York University fertility specialist Dr.

5、Jamie Grifo, worry that se* selection could lead to a kind ofin uteri(子宮)discrimination, especially in cultures where sons are considered superior to daughters. Its valuing one gender over another, Grifo says. I dont think thats something we should be doing. So far, patients at the institute have be

6、en asking for both boys and girls, in order to balance their families. And some ethics e*perts say thats fine, as long as parents are just looking for a little gender variety. If you have three boys, and you want a girl, says University of Te*as reproductive-law professor John Robertson, thats not g

7、ender bias at all.練習(xí)題：Choose correct answers to the question:1.The DNA in the sperm cells can be measured _.A.in the same way how the cattle are herdedB.when they pass through a tube one behind the otherC.after they pass through a laser tubeD.when they are scanned by a laser detector all at a time2.

8、The gender of the baby is decided by _.A.the fathers DNAB.the mothers DNAC.the fathers spermD.the mothers egg3.According to this passage, the practice of se* selection _.A.can help to prevent all genetic problemsB.is totally unacceptable to ethics e*pertsC.was already realized five hundred years ago

9、D.will benefit families with certain inheritable diseases4.Girl sperm was preferred to boy sperm in the research most probably because_A.girl sperm contains more genetic materialB.more mother want to have girl babiesC.girl sperm is healthier and more activeD.girl sperm is more easily purified5.It ca

10、n be concluded from the passage that authors toward”se* selection”is_A.negativeB.positiveC.neutralD.favorable參考答案1.B 推理判斷題。解答此題的關(guān)鍵在于推斷single file的意思。該句把精子通過試管的情形與牛群被趕入牲口圈的情形作對(duì)比，結(jié)合single一詞本身的意思，可以推斷single file是“一個(gè)接一個(gè)”的意思，只有選項(xiàng)B能表達(dá)這個(gè)意思，由此也可否定選項(xiàng)D。選項(xiàng)A最具干擾性，原句是把精子通過試管的情形比作牛群被趕人牲口圈的情形，而選項(xiàng)A說的是測(cè)定精子內(nèi)DNA的方法與放牧的方法相同，顯著選項(xiàng)A只是引用了原文的某些詞語，但表達(dá)的.意思與原文卻迥乎不同。2.C 事實(shí)環(huán)節(jié)題。第1段第3句which引導(dǎo)的非限制性定語從句修飾的是the fathers sperm，而不是插入語the mothers egg,因此選項(xiàng)C正確。3.D 推理判斷題。第2段第1句中的genetic默示有些疾病是遺傳的，