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【判断题】
休闲农业是一种带有休闲时代烙印的农业发展模式，是农业生产与休闲文化的结合。()A.
正确
B.
错误
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【单选题】What is not the possible reason for constructing the Dujiangyan Irrigation System?
A.
To solve the seasonal floods caused by the Minjiang River.
B.
To alleviate drought of the Guanxian County.
C.
To help people travel from west to the east.
D.
To facilitate transport of war materials.
【简答题】车床的控制电路一般采用( )V电压
【简答题】全回流时，操作线与（）重合，操作线方程为（），理论塔板数为（）。当回流比减少到（）称为最小回流比，所需的理论塔板数（）。适宜的回流比应通过（）确定。
【单选题】One of the most possible reasons for constructing the Dujiangyan Irrigation System is ( ) ?
A.
To solve the seasonal floods caused by the Minjiang River.
B.
To alleviate drought of the Chengdu city.
C.
To help people travel from west to the east.
D.
To facilitate transport of business materials.
【单选题】Dujiangyan is an irrigation system built in_______________________ by the Qin State.
A.
prehistoric period
B.
Warring States Period
C.
Shang Dynasty
D.
the Spring and Autumn Period
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