—The noise from the next door is driving me mad.
一 So it is. We must ask our neighbour to stop it.
A:very calm
B:very angry
C:very excited
当我们上午上课的时候,英国的学生正在深夜睡梦中,原因是 ( )
设NA为阿伏伽德罗常数的值,下列说法正确的是( )