铺设无缝线路时必须将轨条置于滚筒上，并配合撞轨确保锁定轨温均匀，低温铺设时应用拉伸器张拉轨条。
参考答案：对
Come _____to my house _____ this Sunday and we'll have a good time together. [ ]
A. on; on
B. over; in
C. on; /
D. over; /
比较同型乳酸和异型乳酸发酵的异同
