限位器的作用主要是保证称量结果准确、误差小。限位器主要是防止秤台（）和左右晃动幅度。
参考答案：横向移动
为什么斜巷人车的牵引拉杆每年进行一次探伤？
Thanks a lot. You've gone to so much trouble. （）
A.It‘s no trouble at all.
B.That‘s all right. I like it
C.I don‘t think it‘s a trouble.
D.That‘s very kind of you.
