患内痔时便血的临床特点为（）。
A.滴血
B.喷射状
C.血与粪便混合
D.脓血便
E.新鲜血在便纸上
参考答案：A, B, E
—Would you mind my _ _ here?
— . You can sit here if you like. [ ]
A. sit; Yes, of course
B. sitting; Certainly not
C. to sit; Certainly not
D. sitting; Yes, of course
所有具有承销业务资格的证券公司都必须成立内核小组。( )
