In practice，it is usual for the ship to be loaded（）to improve the vessel’s movement through the water.

A.a little deeper aft

B.a little deeper forward

C.at the same draught between fore and aft

D.a balance between two sides

患者男性，邻面龋坏，检查：见邻面接触点破坏，拟行邻嵌体修复

修复体边缘线相对最长的是哪一种（）

A．高嵌体

B．嵌体冠

C．树脂全冠

D．金属全冠

E．桩冠