【简答题】完形填空。 Everyone knows that food is a very important thing for health. If we want to 1 healthy, we should have different kinds of 2 . We need food when we feel 3 . Then, if we 4 a bowl of rice or a piec...
【单选题】Use the following information to answer questions, assuming the same temperature for all questions.(假设所有问题的温度相同,根据以下信息回答问题。) 3 H 2 (g) + N 2 (g) ⇋ 2 NH 3 (g), K c = 60 If the reaction quotient for the...
A.
H 2 , N 2 increase; NH 3 decrease(H 2 和N 2 的浓度增加,NH 3 的浓度减小。)
B.
H 2 , N 2 decrease; NH 3 increase(H 2 和N 2 的浓度减小,NH 3 的浓度增加。)
C.
H 2 , NH 3 decrease; N 2 increase(H 2 和NH 3 的浓度减小,N 2 的浓度增加。)