题目内容

No difficulty, no fun.

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Totally alone in the room，her mother wanted to find someone to talk to.

I remained confused about the problem.

预测发生一级反应的药物，其半衰期

A. 与初始浓度C0无关
B. 与t时反应浓度有关
C. 与反应常数k无关
D. 与初始浓度C0有关
E. 与反应时间有关

He went so far as to cheat openly on test.