光吸收系数极大，在可视光区域中，吸收系数可高达（），厚度为1μm就可能充分吸收太阳光。
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已经设立抵押权的动产又被留置的，抵押权人优先受偿。
A. 正确
B. 错误
符号互动理论认为，行为是个体在行动过程中自己”设计“的，不是对外界刺激的机械反应。
A. 正确
B. 错误
党风廉政建设“两个责任”是指党委主体责任和纪委监督责任。
A. 正确
B. 错误
A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）.
A. When dead in the water，it is often difficult to find the neutral position and slight headway or sternway may result
B. When going directly from full ahead to full astern，there is complete steering control
C. When the vessel has headway and the propeller is in neutral，there is no effect on rudder control
D. When maneuvering in port，full ahead or astern power can usually be obtained without changing shaft RPM
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