作业帮TPO5阅读第三篇39题中B.一个以前不知道的Burgess Shale动物For example（这不是现在知道）a well-known Burgess Shale animal called Sidneyia is a representative of a previously unknown （以前不知道的）group of arthropods (a
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TPO5阅读第三篇39题中B.一个以前不知道的Burgess Shale动物For example（这不是现在知道）a well-known Burgess Shale animal called Sidneyia is a representative of a previously unknown （以前不知道的）group of arthropods (a
TPO5阅读第三篇39题中
B.一个以前不知道的Burgess Shale动物
For example（这不是现在知道）a well-known Burgess Shale animal called Sidneyia is a representative of a previously unknown （以前不知道的）group of arthropods (a category of animals that includes insects,spiders,mites,and crabs)" =
例如伯吉斯页岩化石群中的一种著名动物,Sidneyia,就是一种典型的以前还不为人知的节肢动物（一种动物分类,它包括昆虫、蜘蛛、螨虫和螃蟹）.
这不是以前不知道 的 正好吗 为什么选C?
TPO5阅读第三篇39题中B.一个以前不知道的Burgess Shale动物For example（这不是现在知道）a well-known Burgess Shale animal called Sidneyia is a representative of a previously unknown （以前不知道的）group of arthropods (a
.“Sidneyia” is an example of
○ a relative of Anomalocaris and Wiwaxia
○ a previously unknown Burgess Shale animal
○ an extinct member of a currently existing category of animals
○ an animal that cannot be assigned to any modern animal group
原文The Burgess Shale formation also has fossils of many extinct representatives of modern animal groups.For example,...
看到for example不要向后找,要向前找,知道这是举得哪方面的例子.是举得现代节肢动物在史前的已经灭绝的代表.他举例子是为了啥,B选项没错,但不是为了B举例子,是为了C