【单选题】听力原文:It was all but impossible to get to the top of a high mountain in such a short period of time. (29)
A.
We can climb a high mountain very quickly.
B.
It's possible to climb this mountain in no time.
C.
It's impossible to climb a high mountain.
D.
Climbing a high mountain takes time.
【单选题】Living in such a high mountain _________be cold.
【单选题】_____, we must climb up to the top. [ ]
A.
However high is the mountain
B.
However high the mountain is
C.
However the mountain is high
D.
However is the mountain high
【单选题】The town in the valley is ______ by a high mountain.
【判断题】当硅晶体掺入磷原子以后,因为磷原子有五个电子,所以就会有一个电子变得非常活跃,形成P型半导体。
【单选题】洗涤吸管时,( ) 拿住吸量管,( )保持随时可以按住管口的姿势,( ) 拿洗耳球。