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问题 单项选择题

宫口开大6cm，停滞2小时无进展为( )

A．正常产程
B．活跃期延长
C．潜伏期延长
D．活跃期停滞
E．第二产程停滞

答案

参考答案：D

选择题
______ of the household rubbish ______ recycled or reused since the new technology was applied.

A. Three-fourth; has
B. Three-fourths; have
C. Three-fourths; has been
D. Three-fourth; have been
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单项选择题

患有伪狂犬病的猪场中最为常见和最难清除的传染源是（）

A.患病猪只

B.带毒猪只

C.带毒鼠类

D.流产的胎儿和死胎
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