题目

（6分）对于反应2N（g）+3 M（g）XQ（g）+3R（g）,在容积为4L的密闭容器中,将2mol气体N和3mol气体M混合,当反应经2min后达平衡时生成2.4 mol气体R,并测得Q的浓度为0.4mol/L,则X的值为          ,M的转化率为            ，用M物质表示的反应速率vM=                  答案：解析:略 Penguins live together，but each pair has a little piece of ground of their own.When a penguin wants to walk through its neighbor’s ground，it must ask permission.If it does not do that，it will have to fight.Most of the time，penguins live on the water.They eat shell fish and look after their children carefully.All penguins are good parents—the male penguins are perhaps the best parents in the world. They walk in the sea in the middle of the dark Antarctic water. They choose their wives in the dark.They can only hear them—not see them.Then the female penguins lay their eggs and go away for about two months.The males take care of the eggs.If the eggs get cold，there will be no chicks.There is no food.The snow falls heavily and the wind blows strongly—sometimes at 150 kilometers an hour.The penguins do not move.When the females return from the sea，they will not remember their husbands.It does not matter.Only one thing matters—the eggs.Male penguins never fight—unless a penguin leaves a chick for a minute.They then fight because they all want it.They are strange and wonderful birds.1.It seems interesting and unusual that the male penguins choose their wives ______.A.when the female penguins return from the seaB.just by hearing in the darknessC.each time they see the lovely femalesD.after they have had their own grounds2.Male penguins fight when ______.A.they choose their wivesB.they see a chick left aloneC.they want to get something to eatD.they walk through their neighbors’ ground3.From the passage we know that ______.A.penguins live a hard lifeB.penguins live in pairsC.penguins will fight if one walks through others’ ground without permissionD.each penguin has a little piece of ground of its own4.The penguins choose their wives in the dark. We can infer that ______.A.penguins like nights very muchB.there is no daytime in that place at allC.the weather is cloudy and rainy all the year aroundD.the sun can’t shine there for nearly half a year every year5.Which of the following is NOT true?A.Female penguins take care of the eggs.B.Female penguins often have their new husbands.C.Male penguins use their ears to choose wives.D.Male penguins don’t move when they take care of eggs，even though the wind often blows strongly.