涂料稀释剂是用来（）现成成膜物质溶液的挥发液体。
A、溶解
B、稀释
C、固化
D、催干
参考答案：B
In relation to the turning circle of a ship , the term advance means the distance（）.
A.gained at right angles to the original course
B.gained in the direction of the original course
C.moved sidewise from the original course when the rudder is first put over
D.around the circumference of the turning circle
要保证水泵不汽化，必需汽蚀余量应（）有效汽蚀余量。
A.大于
B.小于
C.等于
