试述骨骼肌的收缩机理。
参考答案:
粗细肌丝的结合粗细肌丝的滑动粗细肌丝的解离
—The hazy weather has ________ for almost a week in North China.
—Yes, and the government has tried to solve it.
A.finished
B.lasted
C.begun
D.passed
舌体瘦薄,舌色淡白提示()
A.阴亏
B.伤津
C.气血两虚
D.阳虚
E.气虚