A：9
B：12
C：6+22
D：6+42
若ab>0且直线ax+by-2=0过点P1,2，则1a+2b的最小值为( )
借助叫车软件进行网络预约拼车是“互联网+”时代出现的新的出行方式。这一方式在发展过程中，既有喝彩声，又有质疑声。
有人认为，网络预约拼车可以在一定程度上解决打车难、运力资源浪费、经济与环境效益低等问题。网络预约拼车前景光明。
但也有人认为，网络预约拼车行业从业人员进入门槛较低，素质参差不齐，偷逃税费现象较为普遍，同时民众的出行安全和隐私权等无法得到保障……网络预约拼车前景不容乐观。
结合材料并结合经济知识说明预约拼车发展前景光明的理由。
37年前，改革开放的春风吹遍神州大地。下列选项能够反映改革开放给人们生活带来变化的是（ ）
A
Fascinating Plant Show
All kinds of plants from all over the world will surprise you!
Time: 8:00 am—6:00 pm, May 1st—May 10th
Ticket price: ￥10
Place: People's Park
Traffic: No.1 Bus, No.10 Bus, No.12 Bus
Welcome to the Biggest Gardening Club!
Do you like gardening? Do you want to learn how to plant flowers? Please come to the Gardening Club.
Time: 10:00 am—4:30 pm, Wednesday—Sunday
Tel: 15831777899
Mr. Mango's Fruit Store Sale
We have all kinds of fresh fruits on sale. Do you like apples? We have red apples for only ￥2/kilo. We also have mangoes(芒果) for￥6/kilo, watermelons for￥1/kilo and pears for ￥2/kilo. Come and see by yourself.
Time: 8:00 am—8:00 pm
Hotline: 5684764
