我国规定，投保团体的人数等于或少于（）时，所有成员必须全部投保；投保人数多于（）的，

冬期施工时，混凝土的入模温度不应低于5℃；夏期施工时，混凝土的入模温度不宜高于气温且不宜超过30℃。施工单位每工作班至少测温（）次并填写测温记录。监理单位至少测温（）次。

A.3，1

B.1，1

C.6，3

Mr Johnson didn’t have an experience of travelling in a plane before and he read a lot a 小题1: air accidents, so one day when a friend offered to take him for a ride in his own small p 小题2: , Mr Johnson was very w  小题3:   about accepting. Finally, however, his friend promised him that it was very s  小题4:  , and Mr Johnson boarded the plane.

His friend started the engine and began to taxi(滑行) onto the runway of the airport. Mr Johnson h 小题5:  the sound of the engine. He was extremely frightened and c 小题6:  his eyes.

After a minute, he opened t 小题7:  again, looked out of the w 小题8:  of the plane, and said to his friend , “ Look at the people down there. They look as small a 小题9:  ants, don’t they?” “Those are ants,”answered his friend. “We’re s 小题10:  on the ground.”

应用数据库的主要目的是( )。

A．解决数据保密问题
B．解决数据完整性问题
C．解决数据共享问题
D．解决数据量大的问题

割缝防砂筛管是在油管上（），排列均匀，结构简单，施工方便。

A、钻大眼

B、钻小眼

C、割缝

D、焊缝

液压传递原理是液压传动的基本原理。