多项选择题

平面弯曲梁变形包括哪几个变形？
A、挠度
B、转角
C、拉伸
D、压缩

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单项选择题

After the Greeks successfully repelled the Persian troops, Alexander the Great emerged, and, having received a unified kingdom from his father, he started a campaign against the enemy. He eventually managed to expand Greek territory to the depths of Asia, reaching the borders of ( ) . A. Persia B. China C. India D. Turkey

多项选择题

以下裸子植物中球果肉质或者种子具有肉质种皮、假种皮的是
A、罗汉松
B、圆柏
C、雪松
D、银杏