皮肤是人体主要的存水处之一,其含水量占全身的().
A. 10%~15%
B. 18%~20%
C. 20%~22%
D. 22%~25%
在EADI上垂直偏差显示对于高度预选的显示,每个外刻度点代表___偏差。
A. 250ft
B. 500ft
C. 1000ft
D. 2000ft
A _____ boiler is an auxiliary boiler sometimes included in a steamships installation for
A. monkey
B. donkey
C. waste heat
D. main