If you count from 1 to 100, how many 7’s will you pass on the way?a:10 b:11 c:19 d:20 e:21答案见下一页分页 1 2
If you count from 1 to 100, how many 7’s will you pass on the way?
a:10 b:11 c:19 d:20 e:21
答案见下一页