题目

近年来,建筑装潢装饰材料进入家庭。调查发现,经装修的居室中有装潢装饰材料缓慢释放出的化学物质浓度过高,影响人体健康。这些化学物质中最常见的是( ) A.CO                 B.SO2 C.甲醛等有机物蒸气                     D.臭氧 答案：选C。一氧化碳为含碳燃料不完全燃烧生成的;二氧化硫为含硫物质燃烧生成的有毒气体;家居装修,常用含甲醛等物质的黏合剂,甲醛释放到空气中,一旦浓度超标就会对人体造成危害。臭氧能阻挡紫外线的照射,在家居内不会出现。    Praise is like frosting(糖衣) on a cake. A little makes it taste better and too much will ruin everything. Kids need your encouragement and love it when you recognize their achievements. Just don't ruin their trust by leading them to believe every little thing they do is worthy of big cheers. When they grow up,they will find that they can't be accepted by society and probably think it is you who are making them so needy of praise.     Recently,I had the opportunity to observe a family,5-year-old Joshua and his parents,in action. They had arrived at my office about 15 minutes early,and having returned from lunch with a few minutes to spare,I was chatting with my secretary in the waiting room. As I was collecting my things to walk back to my office,I was taken aback by a series of Joshua's mother's comments. The kid was playing with some blocks on the floor,and Mom was giving a running commentary on his progress. “Oh,Joshua,that's such a nice stack (堆) of blocks. You are so smart!” followed by “What a great job. I couldn’ t have built that when I was your age." Then Dad added, “That's my boy”，which nearly caused my secretary to gag(使室息) .After all,the kid was 5 years old,and stacking up a few wooden blocks is not a great achievement. No wonder he was having problems following directions in school — no teacher would be able to give him the amount of attention and praise necessary to keep the child interested.       What is wrong with praising a child? Actually,it may cause a lot of harm if it is not given properly. Most parents believe that giving praise is like giving children healthy food such as calorie-free chocolate “ the more,the better. But praising children in certain ways may set them up to become praise junkies (成瘾者）一 expecting their parents or others to praise them for almost every act or feeling,rather than developing internal measurement for self-respect and feelings of achievement. Try to give praise only when necessary,no more and no less.1. In what sense is praise similar to frosting?   A. Praise is a must for everyone.   B. Praise will make things work better.   C. Praise is generally a dangerous thing.    D.Praise must be given in a proper way.2.The author heard the comments of Joshua's parents.   A. on the way to the waiting room   B. before the lunch break   C. in the early afternoon   D. in his own office3. The underlined words “taken aback” can best be replaced by.   A. shocked           B. confiised   C. attracted         D. encouraged4. The family hoped the author could .   A. teach Joshua about blocks   B. help solve Joshua's problems   C. get in touch with Joshua's teachers   D. give Joshua more attention and praise5. What advice does the author give parents?   A. Not to turn children into praise junkies.   B. To act as a praise junkie in certain ways.   C. To give children as little praise as possible.   D. Not to give children calorie-free chocolate.