“走息道”的气是：
A．元气
B．宗气
C．营气
D．卫气
E．肺气
参考答案：B
正常覆盖时，上颌切牙切缘到下颌切牙唇面的水平距离是（）
A.10mm以上
B.8～9mm
C.6～7mm
D.4～5mm
E.小于3mm
The reason ___ he is absent is ___he has a bad cold.
A．why; that
B．why; because
C．that; because
D．for; that
