问题
选择题
— I don't care for baseball.
— How can you say you don't like something _____ you've never even tried it! [ ]
A. till
B. after
C. unless
D. when
答案
答案：D
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— I don't care for baseball.
— How can you say you don't like something _____ you've never even tried it! [ ]
A. till
B. after
C. unless
D. when
答案：D
C分别在三种不同实验条件下进行，它们的起始浓度均为
、
及
。反应物A的浓度随时间的变化如下图所示。