题目

对已达化学平衡的下列反应  2X（g）＋Y（g）2Z（g），减小压强时，对反应产生的影响是（    ） A．逆反应速率增大，正反应速率减小，平衡向逆反应方向移动 B．逆反应速率减小，正反应速率增大，平衡向正反应方向移动 C．正、逆反应速率都减小，平衡向逆反应方向移动 D．正、逆反应速率都增大，平衡向正反应方向移动 根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项多余选项。 — Good evening. Grandma's Restaurant. May I help you? — Good evening. 1_____— Thank you. May I have your name, Miss? — Mary Brown. — 2_____ — I'd like to order the "Free Matching Dinner for 2". — Yes, you may choose two soups, two drinks and four main course from the menu. — 3_____ — Are you ready? What Kind of soup do you want? — Chicken soup and tomato soup. — 4_____ — I'd like a plate of noodles, two chicken wings. some beef and a bowl of rice.— 5_____ — May I coke and some green tea,please. — May I have your address, please? — Sure, kingston Court, Belair Cardens. Shatin.— Okay, let me see. A. May I book a table in yourrestaurant for tonight? B. I would like to order some food for dinner. C. Miss Brown, please tell me your order. D. How about your main courses? E. Would you like some drinks? F. Okay. Let me see. G. And your drinks?