单选题：According to Paragraphs 2 and 3, scientific publishers like

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题目内容：
According to Paragraphs 2 and 3, scientific publishers like Elsevier have A．thrived mainly on university libraries.
A．thrived mainly on university libraries.
A．thrived mainly on university libraries
B．gone through an existential crisis.
B．gone through an existential crisis.
B．gone through an existential crisis
C．revived the publishing industry.
C．revived the publishing industry.
C．revived the publishing industry
D．financed researchers generously.
D．financed researchers generously.
D．financed researchers generously
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答案解析：

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第12题答案是A．On the basis of A．On the basis of A．On the basis of B．At the cost of B．

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简述教学评价的原则。

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