曲折而西，又启一关。 西： 启： 关：
参考答案：西：向西走。启：打开。关：门。
Recently there have been many occasions____ you have attended events on your own.
A．where
B．which
C．when
D．why
气停留阻滞于局部的病理变化为
A．气虚B．气滞C．气逆D．气闭E．气陷
