【单选题】()是指直接或者间接向水体排放的,能导致水体污染的物质。
【简答题】量块按“级”使用时应以量块的标称长度作为工作尺寸,该尺寸包含了量块的 误差。
【单选题】某孕妇,孕 35 周,胎方位为枕右前,听取胎心音 的部位应是
【单选题】Which of the following statements is true concerning centrifugal pumps?
A.
They are particularly suited for pumping high viscosity fluids
B.
They are started with the discharge valve opened
C.
The flow of liquid is developed by imparting energy due to the rotation of an impeller
D.
They are always mounted in a horizontal position
【单选题】某孕妇,孕35周,胎方位为枕右前,听取胎心音的部位应是