单选题：According to the passage, scientists are greatly interested

题目分类：理工类
题目类型：单选题
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题目内容：

According to the passage, scientists are greatly interested in biological fuels: because____. A．they will provide a long-term solution to coal liquefaction
B．they are essentially hydrogen-based fuels
C．they can be made from accessible natural materials
D．they can be produced on a large scale

参考答案：

答案解析：

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我国台湾省民俗禁用雨伞送人，这是因为闽南语中“雨伞”与“__________”同音，当地也禁用刀剪送人，因为刀剪有“__________”的含义。

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分类：理工类题型：单选题