题目

把6 mol 气体A和5 mol气体B通入容积为4 L的密闭容器中，在一定条件下发生如下反应：3A（g）+B(g) 2C(g)+xD(g);ΔH＜0，5 min 后达到平衡，此时生成2 mol C,测得D的平均反应速率为0.1 mol·(L·min)-1。下列说法中正确的是（    ）A.降低平衡体系的温度，逆反应速率变小，正反应速率增大，平衡正向移动B.恒温下达到平衡的标志是C和D的生成速率相等C.A的平均反应速率为0.15 mol·（L·min）-1D.B的转化率为25%根据每个句子中所给的汉语意思，写出单词的正确形式。每空一词。 1. I did rather _______ (差) in the race. 2. What are you going to do in your _______ (两个月的) holiday? 3. The farmers are both busy _______ (种) vegetables now. 4. He must be ______ (阻止) from crossing the street when the lights are red. 5. Why do you _______ (不喜欢) travelling by air? 6. Lily felt sad because her bird was _______ (死了). 7. By the end of the _______ (二十) century, the world population had passed six billion,. 8. At the _______ (医务室), Kate was looked over carefully by Mr.Brown. 9. Please give us a short talk in English. Nothing _______ (难). 10. He put his other shoe under his bed very _______ (轻轻地).