2011级双证MPA学员英语课外学习材料.pdf

2011级MPA双证学员英语课外学习材料 English Test 1 Part I Reading Comprehension Directions: There are 4 reading passages in this part. Each passage is fo owed by some questions or unfinished statements. Each question or unfinished statement is given four suggested answers, A ), B ) , C) and D ) . You should choose the ONE best answer and mark the corresponding letter on the Answer Sheet with a single line through the centre. Passage One Questions 1 to 5 are based on the fo owing passage. Nuclear powers danger to health, safety, and even to life itself can be summed up in one word : radiation. Nuclear radiation has a certain mystery about it, partly because it can not be detected by human senses. It can not be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can not detect them, sense them, without a radio receiver. Similarly, we can not sense radio activity without a radio detector. But unlike common radio waves nuclear radiation is not harmless to human beings and other things. At very high levels, radiation can kill an animal or human being outright by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe If the radiation does not hurt anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years. This is another reason for some of the mystery about nuclear radiation. Serious damage can be d