从矿粒与气泡接触起，经水化层破裂，到矿粒附着气泡上这一段时间称为（）。
参考答案：附着时间
I was surprised to know that ________ two top students were caught stealing in the supermarket.
Worse still, ________ third one was found fighting with others. [ ]
A. the; a
B. the; the
C. /; a
D. /; the
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