图所示是某同学连接的电铃电路,开关闭合后,电路中始终有电流,但电铃只响一声就不再

题型:选择题

问题:

图所示是某同学连接的电铃电路,开关闭合后,电路中始终有电流,但电铃只响一声就不再响了,原因是

A.电磁铁始终没有磁性

B.衔铁没有向下运动

C.衔铁一直被电磁铁吸着不能回弹

D.电池正、负极接反了

考点:电磁继电器
题型:选择题

阅读理解。

     John Smith doesn't play sports. He has two 5 children. His son, Jim, likes tennis and soccer ball. And

he has a sports collection. 2 He is in the school tennis club. 3 He plays tennis with (和) his friends every day.

Cindy, his daughter, likes baseball and tennis. 4 She only watches them on TV.

1. 写出文中喜欢球类运动的人物: 

    ________________________________ 

2. 将画线句子“He is in the school tennis club.” 翻译成汉语:

    ________________________________

3. 写出画线句子“He plays tennis with his friends every day.” 的同义句:

    ________________________________

4. 下面哪一项能填入文中空白处,使文意通顺连贯:

   A. She plays them every day. B. But she doesn't play them. 

5. 根据上下文,猜测画线单词“children” 的含义: 

    ________________________________

题型:选择题

— People says your little brother has been admitted into Qinghua University.

— Yes. Never ________ he could achieve so much success.

A.I had thought

B.I would have thought

C.could I have thought

D.will I have thought

题型:选择题

国家实行中药品种()。

A.保护制度

B.凭企业证照放行办法

C.倾斜政策

D.分类管理

E.审批制度

题型:选择题

企业的日记账应逐日逐笔顺序登记,而总账既可以逐笔登记,也可以汇总登记。

题型:选择题

下列人员中应对本单位的会计工作和会计资料的真实性、完整性负责的有()。

A.单位负责人

B.主管会计工作的负责人

C.会计人员

D.会计主管

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