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问题 选择题

如图所示的LC振荡电路中,已知某时刻电流i的方向指向A板,且正在增大,则 

A板带正电

线圈L两端电压在增大

电容器C正在充电

电场能正在转化为磁场能

答案

答案：D

电流增大说明电容器正在放电，下极板为正极，电场能转化为磁场能，由可知电动势在减小，B错

阅读理解

根据短文内容，选择正确答案。

　　I have two good friends. Their names are Tom and Mary. Tom likes sports

very much.  He often plays soccer with me. He eats healthy food every day. He

likes eggs for his breakfast. He has hamburgers and carrots for his dinner. Mary

likes sports, too.  She is a runner. She likes watching TV. She likes chicken and

tomatoes but she doesn't like carrots.

1. Tom and Mary are my _____.

A. friends    

B. uncles    

C. brothers    

D. sisters

2. I often play soccer with _____.

A. Mary    

B. Tom    

C. my teacher    

D. my father

3. Tom likes _____ for breakfast.

A. carrots    

B. tomatoes    

C. eggs    

D. bread

4. Mary doesn't like _____.

A. tomatoes    

B. chicken    

C. carrots    

D. watching TV

5. —Does Tom have hamburgers for his dinner?

    —_____．

A. Yes, he does    

B. Yes, he is    

C. No, he doesn't    

D. I don't know
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多项选择题

盘状红斑狼疮的皮损特点是：（）

A．好发于面部

B．盘状红斑，表面有毛细血管扩张，附有粘着性鳞屑

C．中心可发生萎缩

D．玻片压之有苹果酱颜色结节

E．剥去鳞屑有薄膜现象及点状出血
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