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用一根绳子测井深,将绳4折,井外还余8尺,将绳6折,正好等于井深,绳长几尺?井深几尺?
井深:
4×8÷(6-4)
=4×8÷2
=16(尺)
绳长:
16×6=96(尺)
答:绳长96尺,井深16尺.... -
how far from Utopia we were.这个是什么语法结构,we were 为什么放在后面?原文如下.
how far from Utopia we were正常的句子是we were far from Utopia ,这里它用了感叹句做at 的宾语.把we were far from Utopia 改
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若函数y=f(x)是周期为2的偶函数,当x属于[2,3]时,f(x)=x-1. ⑴当x属于[1,3]
由T=2,得f(x)=f(x 2),得f(-2)=f(2)=1;f(-1)=f(3)=2
而在[2,3]上f(x)=x-1则在[-2,-1]上f(x)=x 3
由偶函数得 f(x)=f(-x) 得 f(-2)=f(2)=1 -
The maxim of relation requires that a participant's contribution be relevant to the conversatio
关系准则的要求是参与者的贡献是对有关联系...