噎膈津亏热结型的舌质是（）
A.舌质偏红
B.舌质紫暗
C.舌质红绛
D.舌质红干
E.舌质淡红
参考答案：D
It was required by the headmaster that all the students _____ at the meeting. [ ]
A. should present
B. present
C. attended
D. be present
使电流中断而不能流通的电路称为（）。
