按照ITU标准,传输速率为622.080Mbps的标准是()
A. OC-3
B.OC-12
C. OC-48
D. OC-192
参考答案:B
This shirt is a little _____ than that one. [ ]
A. cheap
B. cheaper
C. the cheapest
D. cheapest
婴儿窦性心动过缓时,心率不超过
A.70次/分
B.80次/分
C.90次/分
D.100次/分
E.120次/分