题目内容
（请给出正确答案）
[主观题]
The criminal always paid cash so the police could not track him down.A. onB. byC. forD. in
The criminal always paid cash so the police could not track him down.
A. on
B. by
C. for
D. in
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IS-95标准的CDMA移动系统的信道带宽为()。
