问题
选择题
He found himself _______ on the ground when he came to himself the next morning. [ ]
A. lie
B. lay
C. lying
D. laid
答案
答案：C
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He found himself _______ on the ground when he came to himself the next morning. [ ]
A. lie
B. lay
C. lying
D. laid
答案：C
与化合物
在一定条件可发生类似反应①的反应，其产物的结构简式为 。