事故及故障处理应急预案按险情等级影响程度分为()类。
A、1
B、2
C、3
D、4
参考答案:C
We all know that ____ man is is the only creature that has developed____ power of speech.
A ∕, the B the, the C ∕, a D the, a
腹壁听诊,哪种声音与胎心音频率一致()
A.胎盘血流杂音
B.腹主动脉音
C.脐带杂音
D.胎动杂音
E.子宫杂音