在口岸检验合格的汽车，由口岸检验检疫机构签发《入境货物检验检疫证明》，并一车一单签发《进口机动车辆随车检验单》。（）
参考答案：对
A definite advantage of using water as a fire extiguishing agent is its characteristic of（）.
A.alternate expansion and contraction as water in a liquid state becomes a vapor
B.absorption of smoke and gases as water is converted from a liquid to a vapor
C.rapid contraction as water is converted from a liquid to a vapor
D.rapid expansion as water absorbs heat and changes to steam
水工建筑物主要按什么分类？并简述其分类。
