使用片剂型菌斑染色剂应在口内咀嚼
A．30s
B．1min
C．1．5min
D．2min
E．2．5min
参考答案：B
The young girl was _____ to ask such a simple question and nodded like the others.
A．shamed
B．ashamed
C．shameful
D．shameless
专业分包合同在履行过程中风险控制的重点有哪些？
