关于臀位剖宫产术,何项正确()
A.宫口开全,脐带脱出
B.中骨盆轻度狭窄
C.估计胎儿体重为3000g
D.宫口未开全,胎足脱出
E.第一产程宫缩乏力
参考答案:B
The speech the headmaster made at the school assembly _________ the blueprint of the school's
development made both teachers and students excited.[ ]
A. being concerned
B. to concern
C. concerned
D. concerning
已知正弦交流电流i=10T2sin(314t+25°)则其频率为()。
A.50HZ
B.220HZ
C.314HZ
D.100πHZ