it is use ful to be able to predict the extent__...it is useful to be able to predict the extent__which a price change will affect supply and demand.A.from B.with C.to D.for我知道是介词+which形式,可是我还是想不通,
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![it is use ful to be able to predict the extent__...it is useful to be able to predict the extent__which a price change will affect supply and demand.A.from B.with C.to D.for我知道是介词+which形式,可是我还是想不通,](/uploads/image/z/11747596-4-6.jpg?t=it+is+use+ful+to+be+able+to+predict+the+extent__...it+is+useful+to+be+able+to+predict+the+extent__which+a+price+change+will+affect+supply+and+demand.A.from+B.with+C.to+D.for%E6%88%91%E7%9F%A5%E9%81%93%E6%98%AF%E4%BB%8B%E8%AF%8D%EF%BC%8Bwhich%E5%BD%A2%E5%BC%8F%2C%E5%8F%AF%E6%98%AF%E6%88%91%E8%BF%98%E6%98%AF%E6%83%B3%E4%B8%8D%E9%80%9A%2C)
it is use ful to be able to predict the extent__...it is useful to be able to predict the extent__which a price change will affect supply and demand.A.from B.with C.to D.for我知道是介词+which形式,可是我还是想不通,
it is use ful to be able to predict the extent__...
it is useful to be able to predict the extent__which a price change will affect supply and demand.
A.from B.with C.to D.for
我知道是介词+which形式,可是我还是想不通,
it is use ful to be able to predict the extent__...it is useful to be able to predict the extent__which a price change will affect supply and demand.A.from B.with C.to D.for我知道是介词+which形式,可是我还是想不通,
在这个从句中which指代了extent,所以这个介词相当于是放在extent前面,那么在以下的选项中可以和extent连用的,只有C to了.
另一方面,从句子的意思上来说:
It is useful to be able to predict the extent
能够预测(这个范围)是很有用的
to which a price change will affect supply and demand
在(这个范围)之内价格变化会影响供求关系
在这个意义上而言,我个人认为用介词"within"也可以的
所以这句话完整的释义就是:
能够预测对供求关系造成影响的价格变化的范围是非常有用的.
C.to
to some extent.在一定程度上
记住在extent 前是个to 就是了, 没必要做深刻的了解.