适合自行车骑行的纵坡宜为（）%，道路最小纵坡一般为0.5%。
参考答案：2.5
—I won't have time to go shopping with you this afternoon.
—But you me yesterday.[ ]
A. ordered
B. mentioned
C. promised
D. knew
表达式4+5\6*7/8 Mod 9的值是______。
A．4
B．5
C．6
D．7
