这里为什么不用for而用of?

相关推荐

• I known you would want to known that这里为什么 要加would
• 为什么我们说面临时用faced with不用facing with
• 一个很难的高中英语单选题—I was wondering if we could go skiing on the weekend.— It ____ good.A：Sounds B：Sounded 然后解释为什么用现在时,而不用过去时?
• -What is he?-He is ( ).A.a poet and a novelistB.the poet and novelistC.poet and novelistD.the poet and the novelist为什么选A?我觉得A中novelist前的a应该不用的～
• 广东高考语法填空“In the beginning, there was only 24 __________very small amount of unfairness in the world, but everyone added a little,always 25 _________(think) that it was only small and not very important, and look where we have ended up today.”为什么这里网上的都说是填thinking啊,但后面的是look,如果填thinking后面是looking才对啊.
• 为什么开关用ON和OFF而不用YES和NO
• 已知数列｛an}的通项公式为an=(n+2)*(9/10)^n,试问n取何值时,an取最大值?试求出最大值.为什么用an/a（n-1）,算的是当n=7时有最大值;而用a（n+1）/an,算的是当n=8时有最大值.算的方法如下：（是不是方法错啦?）an=(n+2)*(9/10)^n a(n+1)=(n+3)*(9/10)^(n+1) a(n+1)/an=[(n+3)*(9/10)^(n+1)]/[(n+2)*(9/10)^n] =9(n+3)/[10(n+2)] 当a(n+1)/an≥1时,说明an是递增数列 即9(n+3)/[10(n+2)]≥1 解得n≤7,即an在n≤7时是递增的,在n>7时是递减的 所以an在n=7时an最大a7=9*(9/10)^7=9^8/10^7
• 1、火车转弯做圆周运动,如果外轨和内轨一样高,火车能匀速率通过弯道做圆周运动,那么火车的向心力来源于?2、A、B、C三个物理放在旋转的圆台上,动摩擦因为均为μ,A的质量是2m,B和C的质量均为m,A、B离轴R,C离轴2R.当圆台旋转时,则若A、B、C均为滑动,则B的摩擦力做小.为什么?（根据公式f=μN,N=G=mg,应该B和C摩擦力一样大的阿,这里是不是要从向心力大小考虑?还有,怎么确定向心力的来源?）
• 为什么＂The owner and captain refused to leave his ship which was sinking.＂而不用＂their ship＂
• will you开头的问句为什么不用sorry,i won't回答
• 东西两港距离为200千米.甲船由东港向西港、乙由西港向东港同时航行.相遇后继续前进、甲速每小时减少2千
• 关于汉字美的方面的古诗词