【单选题】
阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子作出判断。如果该句提供的是正确信息，请选择A项；如果该句提供的错误信息，请选择B项；如果该句的信息文章中没有提及，请选择C项。
Scientists are planning to use human immunodeficiency (免疫缺陷) virus (HIV), one of mankind’s most feared viruses, as a carrier of genes which can fight cancer and a range of diseases that cannot be cureD、The experts say HIV has an almost perfect ability to avoid the body’s immune (免疫的) defenses, making it ideal for carrying replacement genes into patients’ bodies, according to the Observer.
A、team at theCalifornia-based Salk Institute, one of the world’s leading research centers on biological sciences, has created a special new breed of HIV and has started negotiations with the US Food andDrugAdministration (FDA、to begin clinical gene therapy (治疗) trials this year. The first trials are expected to involve patients suffering from cancers that cannot be cured by surgery although project leader Professor Inder Verma said the HIV technique would have "far wider applications".
The plan remains very likely to cause controversy since it involves making use of a virus which has caused more than 22 million deaths around the world in the past two decades. Verma said that the idea of using HIV for a beneficial purpose was "shocking" but the fierce nature of HIV had disappeared by having all six of the potentially deadly genes removeD、
Illnesses such as various cancers are caused when a gene in a patient’s body fails to work properly. In the past two years, breakthroughs in genetics (遗传学) have led gene therapy scientists to try and replace the genes that do not function normally.
Unfortunately, the body’s immune defenses have been known to attack the modified genes and make them lose their effects before they can start their task and progress in the field has been held up by the lack of a suitable carrier.
The HIV virus has the ability to escape from, and then destroy, the immune defense ceils designed to protect our bodies and this makes it attractive to scientists as a way of secretly conveying replacement genes into patients’ bodies.
B．
C、
C、Not mentioned
网考网参考答案：B
网考网解析：
[解析] 题干中的核心结构涉及到“缺钱”和“阻止……进程”，利用这样的结构作为答案线索，发现答案相关句：Unfortunately, the body’s immune defenses have been known to attack the modified genes and make them lose their effects before they can start their task and progress in the field has been held up by the lack of a suitable carrier．句子中只出现了与其中一个核心结构相关的内容(划线结构)，该结构说“缺少合适的基因携带者使这个领域中的工作停滞不前”，现在解题的关键就是确认“这个领域”与题干中的using replacement genes to cure cancer是否相关，所以关注上下文：上文(In the past two years，breakthroughs in genetics(遗传学)have led gene therapy scientists to try and replace the genes that do not function normally．)说“在过去两年里，遗传学上的研究突破仗研究基因疗法的科学家们尝试替换掉那些不能正常工作的基因”，因此判断划线句中的“the field”就是指“使用替代基因”，因此判断问题句的说法错误(原文提到阻止研究进程的原因是“没有合适的基因载体”，而不是“缺钱”)。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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