慢性菌痢需与下列哪些疾病鉴别（）
A.结肠癌
B.慢性血吸虫病
C.溃疡性结肠炎
D.直肠癌
E.克隆氏病
参考答案：A, B, C, D, E
混凝土结构物中实体最小尺寸大于或等于（）的部位所用的混凝土称为大体积混凝土。
A、1m
B、2m
C、3m
D、4m
—Excuse me. Could you tell me ________ get to the airport?
—Certainly. Go straight along here. [ ]
A. how can we
B. how we can
C. when can we
D. when we can
