连线。
①Can your father play football? ____ A. Yes, she can.
②Can she ride a bike? ____ B. Here you are.
③Here's a card for you. Happy Teachers' Day! ____ C. No, he can't.
④Give me a balloon, please. ____ D. Thank you.
在塑料大棚内生产草莓,在适宜的条件下,如改变哪一项,会使产量增加()
“苏湖熟,天下足。”这一谚语反映的实质问题是( )