以腹痛、血性腹泻、脓血便为主要表现的是（）
A.左半结肠癌
B.右半结肠癌
C.小肠肿瘤
D.乙状结肠扭转
E.溃疡性结肠炎
参考答案：E
Was it during the Spring Break_______ you went on a trip to Suzhou?
A．when
B．that
C．in which
D．then
The politician was deeply hurt when many of his former supporters voted _____ him, and he lost his place in the government.
A．for
B．to
C．against
D．at
