滤波器要求阻抗匹配,即它的负载阻抗必须____输出端的特性阻抗、它的输入阻抗____输入端的特性阻抗。()
A、大于,大于
B、小于,小于
C、等于,等于
D、小于,等于
参考答案:C
We would appreciate it very much if you could make arrangements before September 15 to charter a ship()the terms mentioned in your yesterday’s telex.
A.according
B.as
C.on
D.at
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