问题
填空题
一项工程,甲队单独做需x小时完成,乙单独做需y小时完成.甲乙两队合做,1小时可完成这项工程的______.
答案
甲一小时完成
,乙一小时完成1 x
,它们合作一小时完成:1 y
+1 x
=1 y
.x+y xy
故答案为:
.x+y xy
一项工程,甲队单独做需x小时完成,乙单独做需y小时完成.甲乙两队合做,1小时可完成这项工程的______.
甲一小时完成
,乙一小时完成1 x
,它们合作一小时完成:1 y
+1 x
=1 y
.x+y xy
故答案为:
.x+y xy
阅读下面的材料,然后根据材料内容回答所提问题。(共五个小题,10分) I’m Simon from America.I am twelve and I’m at Wllize.junior School(初中).This month We have two school events(事件).One is an English party and one is a school trip.Next month,there will be five events. here is a list.
1.How old is Simon? 2.How many(多少)school events does Simon have in April? 3.Does Simon have a volleyball game in May? 4.When is the Art Festival? 5.Does Simon have a music party at 10:00 pm? |