How are you?[ ]
A. How are you?
B. Fine, thank you.
答案:B
If the computer is _______ good as you said, we shall consider ______ one.
A.much ; buying
B.still ; to buy
C.that ; buying
D.too; buy
背靠背直流输电系统的主要特点是直流侧可以选择()。
A.高电压大电流
B.低电压低电流
C.高电压低电流
D.低电压大电流