Therearealwayslights:red,andyellow.[ ] A_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

There are always lights: red, and yellow. [ ]

A. three, blue

B. two, 不填

C. three, green

答案

答案：C

填空题

计算：（-0.1）³-

）²=______．

填空题

氨冷器一般有（）和卧式两种。