“误码率”显示接收信号的误码情况。如果信号强度足够强，误码率一般为（）
A.-1
B.0
C.1
D.∞
参考答案：B
计算题：假设有两块mV表，一块量程为（0-75）mV，准确度等级为0.2级，另一块毫伏表测量范围（0-300）mV，准确度等级为0.1级，现欲测60mV电压，要求测量误差不大于0.4%，问应选哪一块mV表？
There is probably no better way for a foreigner to appreciate the richness and variety of the English language than () the various ways in which Shakespeare used it.
A. to study
B. studying
C. study
D. by studying
