疏浚工程中浅埂长度为（）m时，应进行返工处理。
A.>1
B.>1.5
C.>2
D.>2.5
参考答案：D
--- My parents always tell me_________ others late at night.
--- They’re right. It’s not polite.
A．don’t call
B．not to call
C．to call
D．not call
简述夸美纽斯《大教学论》体现的主要教育思想
