题目

下列说法中正确的是_____________        A．对物体做功不可能使物体的温度升高        B．即使气体的温度很高，仍有一些分子的运动速率是非常小的        C．一定量气体的内能等于其所有分子热运动动能和分子之间势能的总和        D．如果气体分子总数不变，而气体温度升高，气体分子的平均动能增大，因此压强必然增大Nowadays more and more Chinese teenagers find life more difficult without their parents. They don’t know how to do 1. Because their parents do almost everything for them at home. This is a big problem. Joy is 14 years old. One day her parents went away 2 business, so she had to stay at home alone. At first she thought she would be happy 3 her parents were not in. She could do everything 4 she liked. But it was six o’clock in the afternoon, she felt5. “Oh, it’s time to have supper. Where can I get my food?” she said to herself. Later she found some food in the fridge, but she 6 know how to cook. At that moment, she missed her 7 very much. At last she could only go to the supermarket and 8 some food to eat.Many of teenagers are 9 as Joy. So I think they should learn some basic life skills, like cooking, tidying up their rooms or dressing themselves 10. They shouldn’t depend too much on their parents.1.A.their homeworkB.some shoppingC.businessD.housework (0.65运用)2.A.inB.atC.onD.with3.A.soB.becauseC.butD.until4.A.thatB.whoC.whereD.when5.A.hungryB.fullC.excitedD.bored6.A.couldn’tB.didn’tC.might notD.wouldn’t7.A.cousinB.auntC.brotherD.parents8.A.madeB.boughtC.gaveD.saw9.A.the sameB.difficultC.differentD.warm-hearted10.A.actuallyB.carelesslyC.properlyD.slowly