The shortened form of "carbon dioxide"is :⒉
查看答案
When we leave the room at night ,we should ______ the lights.
A. turn on
B. turn down
C. turn off
D. turn over
Carpooling means ________________.
In order to lead a low carbon life ,we should _________ in our daily life.
A. carpool
B. ride a shared bicycle
C. classify garbage
D. use a cloth bag instead of plastic bags
E. turn off the computer when we do not use it any more
________________ will warn you of the oncoming bad weather conditons.
微信支付 
支付宝支付