当外界条件变化时,化学反应平衡就会被打破,直到新平衡建立。
参考答案:对
Professor Smith, along with his assistants, __ on the project day and night to meet the deadline.
A.work
B.working
C.is working
D.are working
下列属于政府经济性公共服务的有()
A.应用性研究资金投入
B.文化教育
C.国防
D.对产业活动提供的价格补贴
E.社会保障