温度调节器两端轨道应锁定，使钢轨与钢梁伸缩一致。
参考答案：对
The village is ______what it looked like when they settled their homes there 20 years ago.
[ ]
A. not any longer
B. no longer
C. no more
D. not any more
目前聚合物注入泵均选用（）泵，其主要原因是该种泵性能适应粘弹液体，同时对聚合物溶液的粘度损失较小。
A、螺杆
B、离心
C、柱塞
D、齿轮
