“激光是电磁波，激光与生物组织的作用实质上是电磁场与生物组织_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题 B型题

“激光是电磁波，激光与生物组织的作用实质上是电磁场与生物组织的作用”属于（）

A.热作用

B.压强作用

C.光化作用

D.电磁作用

E.生物刺激作用

答案

参考答案：D

单项选择题 B型题

食品卫生检测所采样品是（）

A.大米

B.水

C.空气

D.血液

E.土壤

选择题

—In our English study reading is more important than speaking, I think.

—I don't agree. Speaking is ______ reading. [ ]

A. as important as

B. so important as

C. the most important

D. not as important as