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问题 计算题

如图所示电路中，RL=6 Ω，电流表的量程为0 ～0.6A ，电压表的量程为0 ～3V ，电源电压为8V 。为了使两表都能安全使用，对变阻器连入电路的阻值有何要求？

答案

不小于10 Ω

听力题

根据所给的首字母填写单词（10分）

If you think of after-school activities as a waste of time, you are wrong! After-school activities help us grow up in many w  小题1: . Above all, they offer us chances to practise  what we learn in c  小题2:. Through various activities, we can also learn more about today's society (社会) and a lot of n 小题3:  things that we can't learn from our hooks. What's more, they help to develop our abilities that we need both for our studies now and for our work and life in the f  小题4:  .

We are busy with our studies in school, so after school we all need to r  小题5: ourselves. After-school activities just make it possible for us to breathe f  小题6:  air and remove tiredness. Then, we can pay a  小题7:  to our studies and achieve good results.

Some after-school activities will make us useful and helpful to o  小题8: ; some can keep us strong and h  小题9:  ; some may even change our life. So, all the students, get out and take an a  小题10:  part in various after-school activities!
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单项选择题

计划实施过程的检查，指的是( )。

A．仅是作业者的自检

B．仅是作业者互检

C．仅是专职管理者专检

D．包括作业者自检、互检和专职管理者专检
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