增加平均次数会导致()
A.延长扫描时间,提高信噪比
B.延长扫描时间,降低信噪比
C.缩短扫描时间,增加信噪比
D.缩短扫描时间,降低信噪比
E.以上均不是
参考答案:A
But for the sudden rainstorm, our trip to Hong Kong _____ a very pleasant one.
A.was
B.would have been
C.would be
D.had been
车辆走合保养的周期一般为()
A.6个月
B.2000~3000Km
C.严格按厂家规定执行