北京市師大附中20xx-20xx學(xué)年初三上期中英語試卷(編輯修改稿)

　

【文章內(nèi)容簡介】 in the world. But every person is unique. Some people have brown eyes, others have blue eyes, green eyes, black eyes or grey eyes. Some have dark hair, others have light hair. Some are tall, others are short. Some are fat, others are thin . Besides people, there are millions of other living things. Some are so small that we can39。t see them. Every living thing is different from every other. Every living thing is a unique bination of characteristics(特征 ). Why is each living thing unique? Where do its characteristics e from? Do people receive characteristics from their mother and father? Which characteristic do they receive? How？ These are some of the questions that biologists have to answer. The work of one man one hundred years ago was especially important. His name was Mendel. Mendel studied plants and did experiment after experiment. Finally he discovered that something mysterious we now call genes(基因 ) made every living thing different from every other. Genes are very tiny pieces of matter. They carry information from parents to children. Long after Mendel39。s work, biologists discovered that in a person genes told whether he would have brown eyes or blue eyes, whether he would have dark hair or light hair, whether he would be tall or short, whether he would be thin or fat. Now we know that every person is unique, one reason is that every person is a unique bination of genes. 54. This article is . A. a science report B. a government report C. a school report D. a story 55. Mendel . A. studied why people have eyes of different colours B. did a large number of experiments C. discovered that every living thing is unique D. is still working on genes 56. The best title for this passage is . 6 A. Why Every Living Thing is Different from Every Other B. Why Every Person Has Hair and Eyes C. Mendel — A Great Doctor D. Why Each Plant Was of a Certain Color, Shape and Size D When TV programs report wars or disasters (such as a flood, an earthquake or a sudden accident), the editors rarely use the most horrifying pictures of dead or wounded victims because they don39。t want to upset their viewers. Even so, viewers are usually warned in advance that they “ may find some of these disturbing” so they can look away if they choose. But the men and women whose jobs are to record those scenes — the TV cameramen — have no such choice. It is their duty to witness the horrors of the war and record them, no matter how gruesome and unpleasant they may be. Consequently, it is one of the most dangerous, exposed and emotionally taxing job that the world offers. Today ,the demand for their work is rising . The explosion of satellite broadcasting and 24 hour news in recent years has created an almost insatiable(=always wanting more) demand for TV information. But major broadcasters and the TV news agencies — such as Reuters and WTN — have never had enough staff to meet the worldwide demand for uptodate pictures,so increasingly they turn to “ freelance” (=doing work without being employed) TV cameramen. These freelance cameramen are independent operators tied to no particular anization. They will work for any pany which hires them for just a few hours or for several weeks in a war zone . But if a freelance cameraman is injured in the course of the job, the TV pany is not responsible for him. The freelancer must survive on his own. “ TV will always need hard, vivid moving pictures which are fresh, but these panies feel unfortable with large numbers of employees on their books,” explains Nike Growing ,once foreign editor for Britain39。s Channel 4 news and now a BBC news presenter. “ By hiring freelancers, they can buy in the skills they need only when they need also enables them to contract out the risk, ” (=arrange for other people to take the risk) he said. 57. The word “ taxing” in Para 1 most probably means . A. demanding B. saddening C. satisfying D. encouraging 58. TV news agencies turn to freelance cameramen in order to . A. save expenses and avoid risk B. get first hand information and pictures C. look for pictures that are of fine qualities D. buy the horrifying pictures they need 59. The freelance cameramen .