若4x=2，4y=3，则4x-2y=______．
∵4x=2，4y=3，
∴4x-2y=4x42y=4x(4y)2=29．
故答案是9．
She is too slow .She _______pass the test ,but she ______too little .
A．would ;knew
B．will ;knows
C．would ;knows
D．will ;knew
新中国成立以来，我国经历了8次大的课程改革。
