这题选几

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这题选几
 

D.

d

令x=1.
求得结果：8/3
而当x=1时只有D满足！

既然式子列出来了，说明x不等于2或-2，化简后就是D

这题选几 这题选几 这题选几 三道英语语法题,1 、Not until the game had begun () at the sports groundA had he arrived B would he have arrived C did he arrive D should he have arrived这题选几?为什么,麻烦一定要说下为什么,最好具体点2、 This is top-secr