单选题：The reason why the laser beam is very strong is that_______

题目内容：
The reason why the laser beam is very strong is that_______ A．it is artificially illuminated
B．it is made up of a concentrated beam of light
C．it sends out heat in all directions
D．its heat is increased by the heat of the sun

参考答案：
答案解析：

阅读下列短文,回答题目.Reading is not the only way to gain knowledge of

阅读下列短文,回答题目.Reading is not the only way to gain knowledge of the work in the pa

分类：公共英语二级  题型：单选题
查看答案

听音频，回答下列问题.What would be the woman' s advice?

听音频，回答下列问题.What would be the woman' s advice?A．Don' t drink water. B．Don' t use

分类：公共英语二级  题型：单选题
查看答案

任何技能都是通过练习而形成的。

任何技能都是通过练习而形成的。

分类：公共英语二级  题型：单选题
查看答案

第42题应填__________

第42题应填__________A．in the other hand B．on the other hand C．in another hand D．on a

分类：公共英语二级  题型：单选题
查看答案