因式分解:ax2﹣4ay2,正确结果是[ ]
A.4a(x2﹣y2)
B.a(x2﹣4y2)
C.a(x+2y)(x﹣2y)
D.4a(x+y)(x﹣y)
答案:C
--- Peter , don’t you believe that we should see each other again ?
---- _______ . Let me have your telephone number and I’ll give you a call .
A.That is easy
B.Take it easy
C.You are all right
D.That’s all right
输精管如何走行?可分几部分?何谓精索?