听力原文:A: How about a pound of milk for our breakfast? But it doesn't seem to look fresh now.Do you think it is still all right to drink? B: Let me smell it. Well, it is gone off. If I were you, I wouldn't even think of it. What does the man mean?
A.
The milk is safe to drink.
B.
The milk is not safe to drink.
C.
She shouldn't have bought the milk.
D.
He wouldn't have milk for breakfast.
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【单选题】在体积不变的密闭容器中发生的反应是CO(g)+H 2 O(g) CO 2 (g)+H 2 (g)下列情况中,能说明该反应达到化学平衡状态的是