胃酸分泌增多引起的腹泻是（）
A.胃泌素瘤
B.大部分肠切除术后
C.服甘露醇
D.服用乳果糖
E.肠易激综合征
参考答案：A
— Do these magazines belong to Tom?
— They _______ be his because he doesn't like them at all. [ ]
A. must
B. can' t
C. mustn't
D. can
使用梅花扳手时，在螺丝上要套正，否则易将螺帽咬坏。
