为保证厂用电系统供电的可靠性,高压厂用母线均采用按()分段的原则将母线分成若干段。
参考答案:锅炉
So addicted to computers ____ that the leaders in the summer camps often had to force them to
break for sports. [ ]
A. the children did become
B. did the children become
C.the children became
D. became the children
教育目的的制定要考虑到哪些客观条件( )
A.生产力和科技发展水平
B.一定社会政治和经济制度
C.制定者的哲学观念、理想人格
D.社会历史发展进程
E.儿童身心发展的规律