上部拉线为7/2.2时,地锚辫应采用()
A.7/2.6
B.7/2.0
C.7/3.0
参考答案:A
Those pants red.
A. is
B. are
C. am
已知函数f(x)为一次函数,且f(3)=7,f(5)=-1,则f(1)=______.