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问题 选择题

如图所示，电路中5个电阻相同，如果ab端输入电压是 6V， 电容器的电容C=10-6F，则下列说法正确的是

A．电容器所带的电量为6×10-6C

B．电容器所带的电量为2×10-6C

C．若只将电容器的极板间距减小少许，稳定后电容器的带电量大于6×10-6C

D．若只将电容器的极板间距减小少许，稳定后电容器的带电量大于2×10-6C

答案

BD

题目分析：根据串并联规律知电容器C上的电压等于并联电阻R两端电压即2V，故其带电量Q=CU=2×10-6C，故选项B正确；根据电容器电容公式知电容增大，而其两端电压仍为2V，故带电量会增大，故选项D正确。

阅读理解

李军第一次拿工资，想给每个家人买一份礼物， 请根据对其家人的具体介绍， 为他们选择合适的礼物。

100-150yuan

300-500yuan

100-200yuan

200-300yuan

小题1:Li jun’s brother  likes listening  to music, he always  listens  to songs while  reading books or on buses.

小题2:Li Jun’s father  is a taxi driver , he is very busy in the day , but  he loves  sports very much . He often plays soccer  when he is free.

小题3:Li Jun’s grandma likes exercising . She often walks  in the park on sunny days. She hopes to be in good health.

小题4:Li Jun’s mother  is a teacher , she is always busy with her work, so she has a sore back these days, she decides to swim in her free time.

小题5:How much will it take Li Jun to get these present for his family ?

A．Less than 700 yuan.

B．More than 1200yuan.

C．Less than 1200 yuan

D．1000yuan.
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单项选择题

以下关于原生质的叙述，正确的是（）

A.原生质泛指细胞内的基质

B.原生质就是细胞质

C.一个动物细胞就是一团原生质

D.细胞膜、细胞核和细胞壁是原生质
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