精制流量计流量突然下降波动,可能的原因是()
A、输送泵出问题
B、输送泵前滤网堵塞
C、流量计异常
D、供料管路物料供给不足
参考答案:A, B, C, D
— You look upset. What is the matter?
— I lost my handbag _______ my ID card and a lot of cash.
including B. containing
C. included D. contained
蛔虫病的传染途径是()
A.空气飞沫
B.虫媒
C.母婴垂直途径
D.呼吸道
E.通过消化道