单项选择题

我国发明的世界上最早的人造耕田是（）。

A.架田
B.涂田

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不定项选择

东北地区的地形从外向里略呈三个半环带，水绕山环，平原内育。

A．正确
B．错误

单项选择题

It is said that there was no need for people to lock doors at night and that items left on the road remained untouched by others during the Tang Dynasty.
A、正确
B、错误