()是整个分类法的基本类目表,它由基本大类进一步区分的类目组成,担负着承上启下的作用

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问题:

()是整个分类法的基本类目表,它由基本大类进一步区分的类目组成,担负着承上启下的作用。

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填一填.
因数16180420270230190170412320
因数64234532630030
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如图所示,两根相距为l的平行直导轨ab、cd、b、d间连有一固定电阻R,导轨电阻可忽略不计;MN为放在ab和cd上的一导体杆,与ab垂直,其电阻也为R;整个装置处于匀强磁场中,磁感应强度的大小为B,磁场方向垂直于导轨所在平面(指向图中纸面内);现对MN施力使它沿导轨方向以速度v(如图)做匀速运动;令U表示MN两端电压的大小,则(  )

A.U=vBl,流过固定电阻R的感应电流由b到d

B.U=vBl,流过固定电阻R的感应电流由d到b

C.U=vBl,流过固定电阻R的感应电流由b到d

D.U=vBl,流过固定电阻R的感应电流由d到b

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主生产计划使用预测来估计产品制造所需要的时间和资源。()

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I visited the nearby car factory today with my uncle, who works there. One thing I noticed was that most of the work is now done by robots. Welding (焊接), painting, testing, and many other jobs are performed by robots now.

The whole dashboard (仪表板) of the car is now put into the car from above, through the windshield, by a robot. It would have taken two men to do this in the past, and it would have hurt their backs quite a bit. It got me thinking: is it a good thing that robots are replacing factory workers? On one hand, robots generally do a more accurate job than people. They aren’t likely to make many mistakes, and if something goes wrong with one car, an alarm goes off. They do exactly the same thing, every time, without fail. A human worker is never able to do exactly the same thing every time. On the other hand, robots also reduce costs for companies. Companies don’t have to pay robots wages or injury compensation (补偿) if they’re broken. If something in a robot does go wrong, it won’t have to take time off work for a year, or even forever, as could happen to a real person if he breaks his back or burn himself while welding.

The obvious downside to all of this is that it increases the unemployment rate. The company will have to bring in some very talented individuals who know how to operate the robots. Unlike regular factory workers, these intelligence workers usually demand a higher pay.

小题1:We can learn from the first paragraph that _______.

A.all the workers are replaced by robots now

B.robots do much of the work instead of workers now

C.there were no workers in the car factory

D.the author’s uncle made robots in the factory小题2:According to the text robots _______.

A.can do work as accurately as workers

B.never break down

C.can do exactly the same thing repeatedly

D.ask for less money from companies小题3:The underlined word "downside" in the last paragraph probably means "_______".

A.weakness

B.favor

C.assistance

D.strength小题4:It can be inferred from the last paragraph that _______.

A.companies refuse to pay for intelligence workers

B.robots have helped all of the workers

C.robots can help solve the problem of unemployment

D.using robots in factories widely will have a long way to go小题5:What is the author’s attitude towards using robots in factories?

A.He is doubtful about it.

B.He thinks it necessary.

C.He is strongly against it.

D. The text doesn’t mention it.

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汉字的区位码由一个汉字的区号和位号组成。其区号和位号的范围各为______。

A.区号1~95,位号1~95

B.区号1~94,位号1~94

C.区号0~94,位号0~94

D.区号0~95,位号0~95

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