搜题请搜索小程序“爱下问搜题”
问题 单项选择题

从商店买来的小电珠，将它接在电源上，发现只是灯丝被烧红，但不能正常发光，产生这种现象的原因是（）。

A、电路未接通

B、小电珠是坏的

C、小电珠的额定功率太小

D、电源的电压小于小电珠的额电压

答案

参考答案：D

改错题

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的一下作文。文中共有10出语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处写一个漏字符号（）, 在其下面写上该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线, 在该词下面写上修改后的词。

注意：

1. 每处错误及其修改均仅限一词；

2. 只允许修改10处, 多者（从第11处起）不计分。

Last Saturday I went to the library as usually. At about noon, I was enjoying my reading near a lake while suddenly I hear someone crying for help. I went up to see what was happened. I was shocking to find a little child struggling in the water in the distance while many peoples were standing by without doing anything. Without any hesitation, I had pushed through the crowd as I took off my coat, but jumped into the water quickly. I managed to reach him and carried him back to safety. To his great relief, the kid was saved.

I was proud what I had done. I hope everyone can give a hand when someone else is in need.

查看答案
问答题 论述题

试述控制实验法与其他研究方法的不同特性
查看答案