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【单选题】
冻融分选作用是由于石块和土的导热性能不同，冻结速度也各不一样。碎石导热率大，先冻结，石块附近迁移并在其附近形成冰，水形成体积膨胀，使碎石产生移动，这样粗的物质和细的物质产生分离。经冻融分选作用，泥土和小的岩屑集中在中间，大的岩块被排挤到周边，呈多边形或近圆形，好像有人有意将石头摆，这种地貌叫作。读图回答下题。 以下条件和地貌的形成无关的是（）
A.
地表比较平坦
B.
岩石颗粒均匀
C.
有充足的水分
D.
气温在零度上下波动
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【单选题】---- Mr. Wang isn’t a teacher, is he? ---- . He’s taught in our school for 5 years. A. No, he is B. No. he isn’t C. Y es, he is D. Yes, he isn ’ t
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【单选题】---Mr. Wang isn’t a teacher, is he? ---- . He’s taught in our school for 5years.
A.
No, he is
B.
No. he isn’t
C.
Yes, he is
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【多选题】科学发展观包括()
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2个
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【单选题】Mr. Wang isn’t popular with his students because he doesn’t treat them _____.
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equally
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badly
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【单选题】—Is that Mr. Wang speaking? —Sorry. He isn’t at home. He ________ abroad for a trip.
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【单选题】---Mr. Wang isn’t a teacher, is he? ---- . He’s taught in our school for 5years.
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【单选题】Mr. Wang isn’t popular with his students because he doesn’t treat them _____.
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C.
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查看完整题目与答案