2. 职称英语
  3. Complete the summary below.Choose ONE WORD ONLY from the passage for each answe

Complete the summary below.Choose ONE WORD ONLY from the passage for each answe

游客2024-01-07  7
问题 Complete the summary below.
Choose ONE WORD ONLY from the passage for each answer.
Write your answers in boxes 37-40 on your answer sheet.
There are many different types of dunes, two of which are most commonly found in deserts throughout the world, the linear dune and the【D1】______dune, sometimes also known as the crescentic dune. It’s been long known that in some places dunes can even sing and the answer lies in the sand itself. To produce singing sand in lab, all the sands must have similar【D2】______. And scientists have discovered that the size of the sand can affect the【D3】______of the sound. But the function of the varnish composed by a mixture of【D4】______still remains puzzling. [br] 【D4】
选项
答案 minerals
解析 利用细节信息“varnish”定位于段落G倒数第四句话“…the singing grains had somekind of varnish or a smooth coating of various minerals…”，原文这里明显提到“varnish”是由不同的矿物质(minerals)所组成的，所以正确答案为minerals。
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