Which statement is TRUE concerning fuel vapors on a vessel（）.
A. Fuel vapors gather in the lowest portions of the vessel
B. Fuel vapors can only be ignited by an open flame
C. Vent outlets should be located above the level of the carburetor air intake
D. None of the above
查看答案
“关关雎鸠，在河之洲”一句用表现手法的是（）
A. 象征
B. 比
C. 赋
D. 兴
我国现在采用的1980年大地坐标系的原点设在（）。
A. 西安
B. 北京
C. 上海
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.
A. It is required on all vessels
B. It may be located in a conspicuous place in the wheelhouse
C. It may be located at the bilge and ballast pump control station
D. All of the above
对于压缩层厚度小于基础宽度的一半的情况，在进行地基基础相互作用时，下列模型中优先选用的是（）。
A. 有限压缩层地基模型；
B. 文克尔地基模型；
C. 弹性半空间地基模型；
D. 弹塑性地基模型。
微信支付 
支付宝支付