物理性脱屑适合干性、衰老、较敏感的皮肤。（）
参考答案：错
痰革兰染色（）
A.肺结核
B.细菌性肺炎的病原诊断
C.肺部感染病原的快速判定
D.衣原体肺炎的病原诊断
E.阿米巴肺脓肿的病原诊断
The manager ______ the worker how to do it, or the accident couldn’t have happened.
A．couldn’t have told
B．ought to tell
C．could have told
D．mustn’t have told
