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材料题请点击右侧查看材料问题查看材料

A. think over
B. apply to
C. call for
D. make up

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I shall give you the book__________you return it no later than tomorrow．

A. on condition that
B. in condition that
C. with condition that
D. in any condition

反应A+B→P在1h后A反应了75.0%，(1)若B浓度恒定，反应对A为一级反应；(2)若反应为二级反应，并且A和B初始浓度相等；(3)若反应为零级反应，计算上述三种情况下2h后反应物A还剩余多少？

某药物若分解30.0%即失效。今测得其在50℃，60℃时的速率常数分别为7.08×10^-4h^-1，1.77×10^-3h^-1。试计算此药物在25℃时的有效期。

材料题请点击右侧查看材料问题查看材料

A. also
B. moreover
C. and
D. then