根据最合适区域法，应选择（）的作为改进对象。
A.合适区域以内
B.合适区域以外
C.离原点远
D.离原点近
参考答案：B
The engines of the ship were out of order and the bad weather ______ the helplessness of the crew at sea.
A．resulted from
B．turned out
C．made up
D．added to
11～18岁的青少年钙的适宜摄入量是______mg/日。
A．400 B．600C．800 D．1000
