阳阳买x盒粉笔,每盒3.5元,付出10元,应找回______元.
10-3.5×x
=10-3.5x(元).
答:应找回10-3.5x元.
故答案为:10-3.5x.
A new bridge ______ across the river and it is expected to open next year.
A.was building
B.is built
C.will build
D.is being built
某个整数的二进制补码和原码相同,则该数一定( )。
A.大于0
B.小于0
C.等于0
D.大于或等于0