张明4分钟跑了360米,张明跑步的时间和路程的比是______.
4:360=1:90,
故答案为:1:90.
—My brother and I will go to the library tomorrow.
-______. Shall we go together? [ ]
A. So am I
B. So do I
C. So I am
D. So will I
我国书刊发行系统主要有哪些机构和单位?