调整脱轨自动制动阀的拉环、顶梁与车轴的间隙值需在（）上进行。
A.曲线
B.坡道
C.平道
D.弯道
参考答案：C
This book must be yours, _______? [ ]
A. mustn't it
B. can't it
C. isn't it
D. may it
晚期肝癌有哪些危候
