题目内容

根据自然条件和耕作制度特点,我国小麦栽培大致划分为哪三类地区?

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Each drilling unit equipped with helicopter fuel storage tanks must have the tanks installed as far as practicable from the().

A. landing area and sources of vapor ignition
B. main deck
C. engine room
D. drill floor

转任具有哪些特点?

网络层是高层与低层协议之间的界面层。

A. 正确
B. 错误

进口集装箱的海关放行章盖在装箱单上。

A. 正确
B. 错误

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