听力原文:W: Hi, Paul, are you ready for your Speech Club presentation this evening?
M: Yeah, I' m going to discuss robots.
W: Robots? You mean those machines that walk and talk like in the movies?
M: No, industrial robots like those used in the automobile and electronic industries.
W: I saw an article about that kind of robot the other day. There were pictures of robots welding cars, but they certainly didn’t look the way I thought robots should look.
M: The robots we usually imagine are made up in science fiction. In industry, robots are designed to do a specific set of operations, such as welding car frames. They are rarely built to resemble humans.
W: Actually, all they need is a kind of brain to give signals, and a mechanism, such as an arm, to carry out instructions, right?
M: Right. Tiny computers become the brain of these robots. The computer sends signals, in the form. of electronical impulses, and move an arm and a claw. The claw is the hand that does particular kinds of work.
W: OK. But we' ye had machines on assembly lines doing work for people for years. That’s what started the industrial revolution, remember?
M: But each of those machines can only perform. a single operation and it takes months to modify them. The new industrial robots can each do a number of tasks. And it’s easy to reprogram them to perform. totally different operations. That’s one reason why they're becoming so popular.
W: They increase productivity too, don't they? I read that even though they're still quite expensive, they often cost less per year than a worker doing the same job. I imagine robots will be used more and more.
M: Exactly. So now that you know all about the next industrial revolution, you don’t have to come to Speech Club tonight.
What kind of robots does the man refer to?
A.Agricultural robots.
B.Industrial robots.
C.Computers.
D.Electrical robots.
第3题
麻疹传染性消失的时间是
A.出疹即日
B.出疹5d后
C.出疹7d后
D.出疹10d后
E.出疹14d后
第6题
无并发症时麻疹传染性消失的时期是 ()
A、出诊2天
B、出诊后3天
C、出诊后5天
D、出诊后1周
E、出诊后10天
第9题
关于麻疹的流行病学,下列哪项不符()
A、麻疹的传染源包括麻疹患者和健康带菌者
B、患儿可从胎盘获得母亲的抗体
C、前驱期传染性最强
D、出疹5天后传染性消失
E、感染后可获得终生免疫
第10题
关于麻疹的流行病学,哪项不符
A.麻疹的传染源包括麻疹患者和健康带菌者
B.感染后可获终生免疫
C.婴儿可从胎盘得到母亲的抗体
D.前驱期传染性最强
E.出疹后5天传染性消失
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