题目内容

足跟侧点地时支撑腿始终保持（），并且随动作有弹性的屈伸。

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开合跳时，膝关节沿脚尖方向屈，膝关节夹角不得小于（）度。

What other thing were invented in ancient China _______ the compass（指南针）?

A. except
B. apart for
C. except for
D. besides

The telephone, which _______ by Bell in 1876, was a great improvement on the telegraph.

A. wasinvented
B. has invented
C. has been invented

There are in China over fifty nationalities（民族）_______ the Hans.

A. except
B. besides
C. except for