选择题：So little ________ about chemistry that the lectur

题目内容：

So little ________ about chemistry that the lecture was completely beyond me.
A.did I know B.I had known C.did I knew D.I know

参考答案：

一项技术构思在说明书或者附图中有体现，但在权利要求书中没有记载的，则( A )

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