【单选题】What are the ideal conditions for creating clouds?
A.
The temperature is as low as minus 235 degrees Fahrenheit.
B.
The air is a million times drier than that of Sahara.
C.
Extremely dry air and low enough temperature.
D.
A mild climate and the build-up of carbon dioxide.
【单选题】She _____ what had happened in a low voice for fear ________ she said might be overheard by others [ ]
B.
whispered to me ; that what
【单选题】下列哪种加工的主运动不是刀具的运动?( )
【单选题】下列哪种加工的主运动不是刀具的运动?( )
【单选题】One of our unique features is allowing our customers to their product.
【判断题】螺纹加工时,复合循环指令G76一定比单一循环指令G92好用。