我国大肠癌最多发的部位在
A．直肠
B．横结肠
C．盲肠
D．降结肠
E．升结肠
参考答案：A
Before the bridge was built ______ the river, the villagers had to take a boat to the other side.
A．in
B．beside
C．across
D．along
可引起视盘水肿（如图）有以下哪几项？（）
A.恶性高血压
B.眼眶占位性病变
C.葡萄膜炎
D.低眼压
E.肺心病
