A:电解稀硫酸溶液,实质上是电解水,故溶液pH不变
B:电解稀氢氧化钠溶液,要消耗OH﹣,故溶液pH减小
C:电解硫酸钠溶液,在阴极上和阳极上析出产物的物质的量之比为1:2
D:电解氯化铜溶液,在阴极上和阳极上析出产物的物质的量之比为1:1
After a heated discussion at the meeting,a new plan came________being,which would have a great effect________the culture life of people.
站在百米赛跑终点计时员,听到起跑的枪声后立即开始计时,测得李明同学百米赛跑的时间是14.00s,当时气温是15℃,则这位计时员所记录结果是( )