题目

(08浙江省开化中学模拟)实验室中根据2SO2＋O22SO3；ΔH=-393.2 kJ・mol-1设计如下图所示实验装置来制备SO3固体。请回答下列问题。     （1）实验前，必须进行的操作是（填操作名称，不必写具体过程）（2）在A装置中加入Na2SO3固体的同时，还需加几滴水，然后再滴加浓硫酸。加几滴水的作用是                                                        （3）小试管C的作用是                                      �Everyone worries. But how do you deal with your worries? Whether your worries are big or small, you can take these three steps to deal with your worries.1. Try to find out what you're worried aboutSometimes, you will know what you're worried about. Other times, you might not. Try to find it out first; if you can't, you can ask for help.2. Think of ways to make it betterThere is always something you can do to help you feel less worried. Sitting there worrying is no fun and it won't solve your problem. Grades at school are often a top worry for kids. If you're worried about grades, ask yourself these questions :☆ Why are grades important? What do grades mean to me?☆ How do I get ready for class? Do I go over my notes even when there isn't a test?☆ Do I have a good place to do my homework?☆ Have I tried different ways of studying?If your worry is about a fight you had with a friend, you might write down all the things you could do-write a note to him or her, invite him or her to a basketball game, say sorry to him or her, etc. Once you have a list of things you could do, you can choose the one that gets your friend back.3. Ask for helpWhen you're worried, it can help to find someone to talk to. You can ask your parents, friends, or teachers for help.1. When you don’t know what you are worried about, ___________.A. you should try to find it outB. you mustn’t tell othersC. you don’t need to think of waysD. you can sit there worrying2. If you are worried about your grades, you can ask yourself questions except _________.A. Why are grades important?B. What do grades mean to me?C. How do I get ready for class?D. Why don’t my teacher like me?3.According to the passage, what will you do if you have a fight with your friends?A.Make new friends.B.Don’t talk to him/her any more.C.Ask him/her to say sorry first.D.Invite him/her to a ball game.4. The passage mainly tells us ________.A. Why people are usually worriedB. When people are usually worriedC. How to deal with our worriesD. What kind of worries people usually have