制动蹄摩擦片沾有水和油污,主要造成的危害是()。
A、腐蚀损坏摩擦片
B、制动蹄复位困难
C、制动力不足
D、损坏制动蹄片
参考答案:C
The novel Frankenstein told the story of a scientist who _____ a monster that _____ a huge human
being. [ ]
A. produced; resembled
B. created; resembled
C. made; liked
D. created; similar
下列哪一项是对萨伊定律的最好描述?()
A.供给创造其自身的需求
B.需求创造其自身的供给
C.需求总是和供给相等
D.供给短缺将导致更大的需求