.Not only____the book,but also he remembered what he had read.

A．he had read

B．had he read

C．he did read

D．did he read

下面哪一项对弯制尖牙卡环的特点叙述 错误

A．卡环臂的臂端大多置于唇面的近中，以利用倒凹和利于美观
B．卡环臂尽量向下，可贴靠龈缘，有利于美观和固位
C．卡环臂的臂端一定要绕过轴面角，到达邻面
D．卡环体不宜过高，以免妨碍排牙
E．卡环体越低越好，有利于就位