Vents are led from the engine to head tank () from the cooling water.
A. for the release of air
B. for the release of water
C. in order to the release of air
D. because the release of air
在6.1兆帕(6000吨)以上的,其含氧量应小于0.01毫克/升。
A. 正确
B. 错误
非交通部系统船台对外无线电资费结算单位的代码是()
A. CN01
B. AAIC
CCIA
D. CN03