2. 外语
  3. Ecologists have been analyzing more than 500,000 plant________and finding 11,676 different tree types in the rainforest.

Ecologists have been analyzing more than 500,000 plant________and finding 11,676 different tree types in the rainforest.

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问题 Ecologists have been analyzing more than 500,000 plant________and finding 11,676 different tree types in the rainforest.
选项 A、examples
B、collections
C、samples
D、selections
答案C
解析 名词辨析题。由句意可知，生态学家需要采集植物样本进行分析研究。sample有“样本，样品”的意思，通常指科学研究中用到的样本，故C为答案。A虽然也有“样本”的意思，但example侧重指能够代表某一品类或某一风格的样品，因此排除A；B是指“收藏品”，D意为“挑选出来的东西；供选择的同类物品”，都与句意不符，故排除。
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