“蜻蜓点水”这是人们经常看到的现象，这是[ ]
A．蜻蜓在喝水
B．蜻蜓在捕食
C．蜻蜓在水中练习飞行
D．蜻蜓在产卵
答案：D
What can Li Lei do?[ ]
A. They can read French books.
B. Yes, he can.
C. He can sweep.
重醋酸
