作业帮1.如何快速求最小公倍数?2.peter and his two brothers went to london the day before yesterday .______of them are come back a.neither b.one c.none d.either 为何选择C?3.mary___a private college last term .now she ____a part -time job in ord
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1.如何快速求最小公倍数?2.peter and his two brothers went to london the day before yesterday .______of them are come back a.neither b.one c.none d.either 为何选择C?3.mary___a private college last term .now she ____a part -time job in ord
1.如何快速求最小公倍数?
2.peter and his two brothers went to london the day before yesterday .______of them are come back
a.neither b.one c.none d.either
为何选择C?
3.mary___a private college last term .now she ____a part -time job in order to pay for her college expenses.
a.attended ,does b.attended,die
c.had attended ,does d.attended,have done
为何选择A?
1.如何快速求最小公倍数?2.peter and his two brothers went to london the day before yesterday .______of them are come back a.neither b.one c.none d.either 为何选择C?3.mary___a private college last term .now she ____a part -time job in ord
1.如果两个数是互质数（即两数的最大公因数是1时）.那么它们的最小公倍数就是这两个数的乘积.例如：4和7的最小公倍数就是4×7=28.
如果两个数有倍数关系.那么较大的数就是这两个数的最小公倍数.例如：3和15的最小公倍数就是较大数15.
如果两数不是互质,也没有倍数关系时,可以把较大数依次扩大2倍、3倍、……看扩大到哪个数时最先成为较小数的倍数时,这个数就是这两个数的最小公倍数.例如：18和30的最小公倍数,就是把30扩大2倍得60,60不是18的倍数；再把30扩大3倍得90,90是18的倍数,那么90就是18和30的最小公倍数.
2.
1）.none这个词很有意思,首先它是一个代词,也就是代替前边或后边提到的事物,如果没有提到就不用none.比如How many students are there in the cinema.None.none就代表只没有学生,可能有别人,How much tea is there in the glass,None.none就代表只没有茶,但有别的,但也句子无关了,none只代表前边提到的学生和茶没有.像None of us likes swimming.none就只代表我们中没有人.
2）.Neither这个词也是代词不过它限定的是后边的东西必须是两者,Neither就表示两者任一者都没有.看似半否,实则全否.
3）.none可以代表后边的东西必须是三者或三者以上.
3.现在在做一份工作肯定选does,相比于现在,前段知识写过去,所以只要过去式.没有涉及到过去的过去,所以不需要had
阿斯达岁的
三个人极其以上表示否定，
时间上是过去，后面是现在的时态