服装业是劳动密集型产业，生产服装需要雇用一大批人。汽车业是资金密集型产业，大量资本投入到由相对少的人操纵的复杂设备上。如果不考虑附加收入的话，一个普通的美国服装工人在1979年的工资是一个普通的汽车工人的46%。 下面哪一项，如果是正确的，可能是造成汽车工人和服装业工人工资差异的因素之一( )
A．通常，服装工人的工资比汽车工人的工资变化小
B．汽车工人工资的增加对制造商总成本的影响比服装工人工资的增加所产生的影响小
C．汽车制造者给雇员提供的附加收入比服装工人得到的更丰富
D．汽车业面临的来自美国以外支付较低工资的公司的竞争要比服装业大
参考答案：B
解析： 对于生产同样价值的产品，服装业需要的工人数量远比汽车业需要的工人数量多，因此对于服装业而言，即使小幅度地增加服装业工人的工资，其对于总成本的影响也是远远大于汽车业的，这就使得美国服装工人的工资远低于汽车工人的工资。B项正是对两类工人工资差异的合理解释。
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| Soon it would be the holidays, but before that, there were year exams. All the 1 were reviewing (复习) their lessons for the exams. If they didn't 2 , they would have to retake (重考). Usually a few students 3 , but Jane didn't want to be one of them. She had worked hard all year, 4 just before the exams she was working so hard that her sister Barbara was 5 about her. She went to bed too 6 . The night before the exam, Barbara 7 her to go to bed early and take a 8 pill (安眠药). She promised to wake 9 up in the morning. When Jane was in the bed. Her 10 kept jumping from subject to subject. At last, with the help of 11 , she went to sleep. Then she had a dream: she was sitting in the examination hall, looking at the examination 12 , but she couldn't answer any of the questions. 13 around her was writing pages and gages. 14 she thought hard (认真思考), she couldn't find anything to write 15 . She kept looking at her 16 . Time was running out. There was only an hour to go. She started one question, wrote two sentences, 17 and tried another one. With only half an hour left she wrote another two sentences. By this time she was so worried that she started 18 . Her whole body shook (颤抖). It shook so much that she 19 up. She was still in bed and it had all been a 20 dream. A minute later, Barbara called her name. | ||||
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