2. 外语
  3. Silicon, a nonmetallic element, is______ abundant element in Earth’s crust.

Silicon, a nonmetallic element, is______ abundant element in Earth’s crust.

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问题 Silicon, a nonmetallic element, is______ abundant element in Earth’s crust.
选项 A、second more than
B、more second the
C、second most of
D、the second most
答案D
解析 The second most correctly completes the superlative structure the second most abundant.
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