齿龈出血不红肿为
A．肾火上炎
B．心火亢盛
C．血热证
D．胃火盛
E．肝胆热盛
参考答案：A
_____ playing dumb with teachers. They know very well their students.
A．It’s no use
B．There is no doubt
C．It’s no wonder
D．There is no need
注塑机内盘片没有抓出来如何处理？
