Didi lets people in about 400Chinese cities use an app（应用程序）on their phones to order a car ride．It also has a car﹣pooling（拼车）service，and it allows people to share a car at a lower price．Didi helps protect the environment because fewer people are driving cars．

A smart home needs a smart toilet．The smart toilet doesn't need an app，the Internet or Bluetooth．But it has a smart home toilet sensor（传感器）．So when you come close，it will change the height of the seat automatically（自动 地）．The smart toilet also helps make the air fresh，so the restroom hardly smells bad．

The smart frying pan（煎锅）can make cooking easy．It has a temperature sensor inside．The sensor can talk to an app on your phone through Bluetooth． When you start cooking，you can tell the app what you are making．The app will tell you how to cook it．If you turn on the "autopilot（自动操作）"of it，the app will control the temperature by itself．

If you lose your keys，don't be nervous．This smart lock lets you open the door with your phone in a few seconds．You'll need an app to get an account （账号）You can name your locks through this account．Then you can control your locks through the app．The account will tell you when a lock is locked or unlocked．

36．Didi helps protect the environment because 　　．

A．	it has a good service
B．	it is used in 400Chinese cities．
C．	people can order a car ride
D．	fewer people are driving cars

37．A smart toilet needs to 　　．

A．	use the Internet
B．	get an account
C．	have a sensor
D．	name a lock

38．The temperature sensor in the smart frying pan can 　　．

A．	tell you how to cook
B．	tell the app what you're making
C．	turn on the autopilot
D．	talk to an app on your phone

39．You can control your locks through the 　　．

A．	app
B．	seat
C．	door
D．	air

40．We may read the passage in a 　　．

A．	story book
B．	science newspaper
C．	guide book
D．	geography magazine