燃烧时,氧气含量要达到()以上。
A.10%
B.15%
C.20%
D.25%
参考答案:B
The following table shows a mutual fund comprised of four stocks, each stock’s number of shares, and the price per share.()
A.Stock
B.Shares
C.Price
D.A
E.6200
F.$10
G.B
H.6000
I.$34
J.C
K.3900
L.$8
M.D
N.2600
O.$52
下列哪些船舶在航不对水移动时应关闭舷灯和尾灯()?Ⅰ、机动船Ⅱ、从事清楚水雷作业的船舶Ⅲ、从事拖网作业的船舶Ⅳ、从事疏浚作业的船舶Ⅴ、失去控制的船舶
A.Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ
B.Ⅱ、Ⅲ、Ⅳ、Ⅴ
C.Ⅲ、Ⅳ、Ⅴ
D.Ⅱ、Ⅲ、Ⅳ