2. 外语
  3. An unconsolidated aggregate of silt particles is also termed silt, ______ a consolidated aggregate is called siltstone.

An unconsolidated aggregate of silt particles is also termed silt, ______ a consolidated aggregate is called siltstone.

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问题 An unconsolidated aggregate of silt particles is also termed silt, ______ a consolidated aggregate is called siltstone.
选项 A、which
B、why
C、whereas
D、whether
答案C
解析
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