一艘轮船从甲地到乙地每小时航行30千米，然后按原路返回，若想往返的平均速度为40千米，则返回时每小时应航行_1千米．_刷题宝

题干

一艘轮船从甲地到乙地每小时航行30千米，然后按原路返回，若想往返的平均速度为40千米，则返回时每小时应航行____千米．

上一题下一题 0.0难度选择题更新时间:2019-06-16 10:53:51

答案(点此获取答案解析）

60

同类题1

已知：a^m⁺ⁿ=68，a^m=17，求a³ⁿ．

同类题2

It's April 12th today and it is my____(thirteen) birthday. I'm in USA, but my parents are in Shanghai. This is____(I) first birthday in the USA. I want to____a birthday party but don't know how to do it. My sister and her nice____have a birthday party for me. I am very happy to have it here, in the USA.____you, my sister, and thank you, my friends. Thank for your love.

同类题3

选出划线字注音全对的一项（）

同类题4

There_____ my baby pants.

同类题5

小学学科试题库

初中学科试题库

高中学科试题库