车天桥、地道的宽度应根据客流量确定应检票，列车对乘车旅客应验票。
参考答案：错
Bill will be away on ----business next week and Lucy will take---place of his position during his absence.
A the; the B/ ; the C the ; / D / ; /
目前认为与直肠癌发生无关的因素是
A．痔
B．溃疡性结肠炎
C．日本血吸虫病
D．高蛋白高脂肪饮食
E．直肠腺瘤
