甲数是20，乙数是30，甲数是乙数的（ ），乙数是甲数的（ ）。（除不尽的，百分号前保留一位小数）
66.7％；150％
旋转阳极X线管定子的极数一般是（）
A.1
B.2
C.3
D.4
E.5
A client with heart failure develops pink frothy sputum, coarse crackles, and restlessness. Which of the following actions should the nurse take first ？（）
A．Check the client's blood pressure.
B．Place the client in high Fowler's position.
C．Calculate the client's fluid balance.
D．Notify the physician.
