又快又好的有奖

问题描述:

又快又好的有奖
1、老李原来做800个零件要用5小时,现在做900个只要用4.5小时,他的工作效率提高了几个百分点?列式( ),结果( ).
英语:1、She speak English(smoothly)用how提问,括号代表横线.
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2、The lift goes down (slowly),haw提问.括号代表横线
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[(900/4.5)-(800/5)]/(800/5)*100%=25%
How does she speak English?
How does the lift go down?