如图所示，把一根包有绝缘层的导线绕在铁钉上，把导线两端的绝缘

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问题选择题

如图所示，把一根包有绝缘层的导线绕在铁钉上，把导线两端的绝缘层刮去，接上干电池后，铁钉

[ ]

A、有磁性

B、会熔化

C、有电流流过

D、两端对小磁针北极都有吸引力

答案

答案：A

填空题

根据句意和首字母提示补全单词。

1. —Is there a l_______ in your school?

—Yes, there is , we can b _____ books there after school

2. After school, we often play football on the p_______.

3. We have English lessons in the language l ______.

4. We can do some reading in the r _______.

5. There are 12 r ______ in the classroom building.

单项选择题

在Visual Basic中，所有的窗体和控件都必定具有的一个属性是 ______ 。

A．Name

B．Font

C．Caption

D．FillColor