下列属于部分损失的是（）。
A.共同海损
B.实际全损
C.单独海损
D.推定全损
参考答案：A, C
儿童卧室中常用的上下铺双人床，下铺床褥面到上铺床板底之间的空位高度不小于（）。
A．850mm
B．750mm
C．900mm
D．920mm
The pollution question as well as several other issues is going to be discussed when the Congress is in ______ again next spring.
A. assembly B. conference C. convention D. session
