1894年，詹天佑入选英国土木工程师学会并成为会员，成为第一个进入该学会的中国籍会员，主要是因为他(　　)

阅读理解

人是微生物群居体

黄月平

       你相信吗？你体内的大多数细胞并不是你自己的，甚至也根本不是人类的细胞，它们是细菌。我们的脚趾上有肉眼看不见的线状真菌在生根发芽，我们腹部有重达1公斤的细菌，我们的身体是由人类细胞、真菌、细菌和病毒组成的混合体，可以被看作是超个体或微生物群居体的一个最好例子。

最近，伦敦大学的科学家提出了上述观点，并阐述了人体内这些微生物是如何相互作用的。他们说，在我们的身体内，存在500多种不同种类的细菌，这些细菌组成了100万亿个细胞，外来的细胞大大超过了我们体内自身的细胞，我们自身的细胞只有几万亿个，所以可以得出结论，我们体内的基因大部分来自于细菌。

       幸运的是，虽然这些细菌在分享我们的食物，但它们不会对我们造成伤害。实际上，细菌通常对我们的身体是有益的，它们通过与我们的免疫系统紧密合作，帮助我们抵御疾病的侵扰。这项研究的负责人说：“我们已经知道某些时候很多疾病是由包括遗传和环境等多种因素引发的，生物群居体这个概念能帮助我们理解疾病的过程。”他相信这个方法运用于心脏病、某些癌症，甚至于一些神经疾病的研究。（选自2005年第3期〈科普文摘〉，略有改动）

方程|2y﹣3|=1的解是（　　）

    Do your family often take a trip? For most families, a trip in a car to an unfamiliar (不熟悉的) area often goes with the question about which way ____(take). This is not the case, however, in the Williams family. They never get ____(lose) when five-year-old Daniel is with them. That's because Daniel has the unbelievable____(able) to tell them the best way to get from one place to another anywhere in England and what's more, he doesn't need a map-he can do it____thinking.

    Daniel____(be) interested in place names since he first learned to talk. When he was about three, he started asking his parents questions about how the roads they drove along joined up, and____soon became obvious that he had a super memory for maps. He had no difficulty____(remember) the roads he saw from the car window.

    Now, after school, Daniel's ____(favor) game is drawing maps of the road systems in the places he hasn't visited. His parents have no idea where his particular talent comes from____no one else in the family has it. Although he has other____(hobby) Daniel's greatest goal in life is to become a mapmaker.