正确答案: B

15：8

题目：甲、乙两物体都作匀速直线运动，已知甲、乙两物体运动时间之比4：5，通过的路程之比为3：2，则甲、乙两物体运动速度之比为（ ）

解析：B

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举一反三的答案和解析：

[多选题]Paul has________ friends here, so he often feels lonely. 学科网

Paul has________ friends here, so he often feels lonely.

few B．a few C．som

few B．a few C．some

[单选题]A

Where in the world can you take an hour's train ride，and pass a forest，a London street，a scene from the Wild West(西大荒)，and a burning building that never burns down? There's only one place，and that's Hollywood，in California． The scenes you see from the tourist train are film sets(布景) in the Universal Studios，one of the oldest and largest movie companies(公司) in the U． S． A．

a famous movie company

解析：21．c【解析】由第一段最后一句可知Universal Studios 是个电影公司。