砂丘（sand dune）

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• 纵向砂丘（longitudinal dune）

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• 星状砂丘（star dune）

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• 新月型砂丘（barchan dune）

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• 纵向砂丘

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• 砂培 sand culture

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• 横向砂丘（transverse dune）

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• 横向砂丘

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• 星状砂丘

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• Good anchorage may be obtained anywany, generally mud and sand, in this water area. Vessel may have（）.

  A . good towing ground B . good holding ground C . good grabbing ground D . good dragging ground

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• 在当今世界，（），已经成为最重要的旅游资源组合，被称为“3S（Sun、Sand、Sea）”工程。

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• 沙波（sand wave）

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• For（）commodities as oil, sand and timber, rail is cheaper than road.

  A . unpacked B . unpackaged C . bulk D . bundled

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• The best method to stop a vessel from dragging anchor in a sand bottom is to（）.

  A . reduce the length of the cable B . pay out more anchor cable C . back the engines D . swing the rudder several times to work the anchor into the bottom

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• 扇中沉积物与扇根沉积物比较，在砂与砾状砂岩中出现主要由辫状河作用形成的不明显的平行层理和交错层理，局部可见到逆行砂丘交错层理。

  A . 正确 B . 错误

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• 3. What is the name of a place where its sand can sing?

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• 37. From the letter we can learn that Sand River _______.

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• 5. Why does the Resonant Sand Gorge sing song according to the legend?

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• as various as the sands of the sea

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• Why does Doree refrain from telling Mrs. Sands about the letter from Lloyd?

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• Why does Mrs. Sands not persuade Doree to refrain from seeing her ex-husband?

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• Why does Doree still visit Lloyd despite of the disapproval she senses in Mrs. Sands?

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• According the depiction, Mrs. Sands is a ().

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• Casting sand is expected to have ( )

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• The passage suggests that artificial sand is ______.

  A．not nice looking B．the best way to slow down erosion C．a foolish idea D．too costly to ever be used

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