若点M(a﹣3,a+4)在x轴上,则点M的坐标是[ ]
A.(﹣3,4)
B.(﹣7,0)
C.(﹣3,0)
D.(4,0)
答案:B
Bob can play tennis but he can’t play piano.
A.the, the
B./, /
C.the, /
D./, the
送料呆滞的故障原因有哪些及消除方法?