开展集运方式主要与规模经济有关。运输工具装运量越大，每吨公里的（）就越低
A.燃料费
B.管理费
C.车站费
D.费率
参考答案：D
毎晩、12時（）寝ます。
A.ぐらい
B.しか
C.ごろ
D.も
A vessel with a large GM will（）.
A.have a small amplitude of roll in heavy weather
B.tend to ship water on deck in heavy weather
C.be subject to severe racking stresses
D.be less likely to have cargo shift
