两根完全相同的长管道如图所示,只是2管安装位置低于1管,两管的流量关系为()
A.Q1
B.Q1>Q2
C.Q1=Q2
D.不定
参考答案:C
Are you _____ in these _____story books.
A.interested. interesting
B.interested. interested.
C.interesting. interested
D.interesting. interesting
关于y的方程b(y-2)=2(b≠0)的解是______.