It’s___(reasonable)to expect people to work more than 60 hours a week.

洒布机试喷时，油嘴正前方几米内不得有人？

人工抬移蛙式夯时，不必切断电源，对吗？

Mary accepted Davids ___(invite)to join him for lunch.

在word编辑下，操作的对象经常是被选择的内容，光标在某行行首的左边，（）可以仅选择光标所在地。

采用鼓风曝气的传统活性污泥法，曝气池中的MLSS应在（）左右

Can you tell us more ___ (precise)what happened last night?

If you had been in better health, we___ (allow) you to join them in the work.

现浇混凝土挡土墙，泵送混凝土时，宜设几人以上人员牵引布料杆？

用手推车运石料时，平道上两车前后间距不得小于几米？