【单选题】Which of the following is true according to the passage?
A.
The volume of the atmosphere is four times that of the world's.
B.
The water in the oceans is the main source of rain and snow on land areas.
C.
The atmosphere is mainly composed of the vapor carded over land by air currents.
D.
The earth cannot support the water in the atmosphere if it falls down onto the earth suddenly.
【单选题】以下哪一项不属于寒证特点“稀”的表现()
【单选题】若螺纹公称直径是M36,检测螺纹外径时,应用外径千分尺的量程为( )。
【单选题】若螺纹公称直径是M36,检测螺纹外径时,应用外径千分尺的量程为( )。
【单选题】在默认情况下FTP服务器的匿名访问用户是
【单选题】在默认情况下 ,FTP 服务器的匿名访问用户是( )
【单选题】According to the man, which of the following is NOT the reason why the party is successful?
A.
The decoration is good.
B.
There are few leftovers.
C.
The friends are very helpful.
D.
The guests enjoy the music.