单选题：What is true of microwaves?

  • 题目分类：理工类
  • 题目类型：单选题
  • 查看权限：VIP
题目内容：
What is true of microwaves? A．Their wavelengths are shorter than those of visible light．
B．Their wavelengths are longer than those of visible light．
C．They are different from visible light as they are a kind of radiant energy．
D．They are visible to the human eve．

参考答案：
答案解析：

Paragraph 6_______________

Paragraph 6_______________

分类：理工类  题型：单选题
查看答案

Many scientists have been probing psychological problems．

Many scientists have been probing psychological problems． A．solving B．exploring

分类：理工类  题型：单选题
查看答案

靖在第_____处填上正确答案。

靖在第_____处填上正确答案。A．unknown B．few C．untested D．1imited

分类：理工类  题型：单选题
查看答案

请在第____处填上正确答案。

请在第____处填上正确答案。

分类：理工类  题型：单选题
查看答案

根据以下资料，回答题。 “…we will need to cure our addiction to oil．”Why

根据以下资料，回答题。“…we will need to cure our addiction to oil．”Why does the author say

分类：理工类  题型：单选题
查看答案