进行应力放散时要求做到什么?
参考答案:沿钢轨全长放散要匀,放散量要够,最后锁定轨温要准。同时要求结合放散应力,整治线路爬行。
I wasn't at home yesterday. I ____ to help with the harvest on the farm. [ ]
A. asked
B. was asked
C. was asking
D. had asked
虽然意识到环境的重要性,但只考虑自己的小环境、小家园而不顾他人,以邻为壑,有的甚至将自己的经济利益建立在对他人环境的损害上,这是认识的()阶段。
A.第四
B.第一
C.第二
D.第三