利用大棚种植蔬菜时,下列措施能增加产量的是( )
A:适当增加光照时间
B:适当提高昼夜温差
C:适当增加二氧化碳浓度
D:ABC都可以增加产量
给下列问答句配对
① What do you need?____ a. I like the red dress.
② Drink some water, Mum. ____ b. Thank you.
③ What do you like? ____ c. I need a red dress.
④ Smell the orange. ____ d. It's windy.
⑤ How is the weather? ____ e. It's nice.