把 0．6molX气体和0．4molY气体混合于2L的密闭容器中，使它们发生如下
题型：不定项选择题
问题：
把 0．6molX气体和0．4molY气体混合于2L的密闭容器中，使它们发生如下反应
3X（g）+ Y（g）
nZ（g）+ 2W（g），5min末已生成 0．2molW ，若测知以 Z 表示的平均反应速率为 0．01mol·L-1·min-1，则n是[ ]
A．1
B．2
C．3
D．4
题型：不定项选择题
请仔细阅读题中各人的情况说明，从A—F六个套餐菜单中为各位选出符合要求的最佳选项，其中一项为多余选项。
小题1: Li Jing, a thin girl, likes French fries, fruits and ice-cream. She doesn’t like rice. She often feels tired and doctor suggests that she eat some more meat such as beef or pork.
小题2: Peng Tao, a heavy boy, likes hamburgers, hotdogs and pizzas very much. Chocolate is his favorite. But his parents don’t want him to eat too much, especially ice-cream.
小题3:Zhang Qi, a tall girl, likes running. Her favorite food is pizza. She exercises a lot and eats a lot. She likes coffee and she only drinks apple juice when she has to.
小题4: Bai Lei, a hungry boy, can’t live without rice and never eats seafood. He likes orange juice but not apple. He doesn’t want to spend more than 10 dollars for one meal.
小题5:Ding Yi is a 16-year-old girl. Her family don’t eat pork. She likes fish and potato chips. Her favorite drink is milkshake. 