【简答题】____工作研究包括方法研究与作业测定两大技术。
【单选题】We have helped the animals in danger _______ it has still a lot of things to do . [ ]
【单选题】Through our joint efforts, we have successfully concluded a __________ with your company.
【单选题】关于滴定管的读数操作表述,下列正确的是?
C.
读数后,最后一位为估读,全部都可以直接读为“0”
D.
读数时应确认滴定管旋塞关闭,取下滴定管,用手捏住滴定管上端,使其保持垂直,将视线与凹液面最低处平齐后准确读出滴定管中溶液体积,最后一位根据实际结果进行估读。
【简答题】构件在大偏心受拉情况下构件全截面受拉,这个说法正确吗?为什么?