This one is _________ than that one.[ ]
A. small
B. smaller
C. big
答案：B
It’s important ______ us ________ some good books.
A．for, read
B．to, to read
C．to, reading
D．for, to read
交流电路的视在功率单位应用（）表示。
A.瓦特
B.乏
C.伏安
