下列各项,易导致妇产科疾病发生的是
A.风、寒、湿B.风、湿、热C.寒、热、湿D.寒、暑、热E.寒、湿,燥
参考答案:C
—Would you have come to his help, had you been free?
—Yes. But I______ engaged.
A.was
B.were
C.hadbeen
D.wouldbe
建筑机械的生产率可分为()。
A.理想生产率
B.额定生产率
C.实际生产率
D.技术生产率
E.理论生产率