The United States is a country_ (advance) in science and technology
一热机的循环效率为15%，在一次循环中从外界吸热2000J，则此热机在一次循环中所做的净功为（）
配合挖土机作业时，能否进入铲斗回转范围？
The rediscovery of this species of birds is one of the most___(ordinary)scientific findings in recent years.
The group is made up of local___(music)who have been performing together for several years.
If you have the right___(equip) ，you won’t find the job difficult.
配合推土机作业时，必须与驾驶员协调配合，作业人员应站在机械运行前方5米或侧面几米以外？
手推车下坡时拉车人应在车前还是车后拉绳？
预制混凝土构件路缘石、大方砖的质量超过25千克时应由几人用夹具抬运？
Every boy and girl ___(treat) in the same way.