结构紧凑,有效容积内传热面积大,传热效率好的是()式换热器。
A、夹套
B、列管
C、螺旋板
D、蛇管
参考答案:B
There are apples in the basket, but there aren't oranges.
A.some, some
B.some, any
C.any, any
D.any, some
求圆柱形容器的容积,就是求圆柱形容器的体积.______.(判断对错)