题目

如图Z2-5为初中化学常见的仪器装置，请回答下列问题。 图Z2-5 (1)写出仪器名称：a ，b 。  (2)实验室可选用 (填序号)和D装置制取CO2气体；在添加药品前，首先应进行的操作是。  (3)实验室用KMnO4粉末制取O2的化学方程式为；发生装置中需在试管口放一团棉花，以防止KMnO4粉末。  (4)实验室用过氧化氢溶液及少量MnO2制取O2，可选用(填序号)装置收集O2；MnO2起作用。         Be Brave With New Things    The old advertising slogan, “so simple a child can do it ,” has taken on new meaning to me. A few weeks ago I got a computer, but I an mechanically illiterate. I knew that children had no fear of the future, so that seemed a good place to seek help. I asked my nephew, twelve years old, at an elementary school, to help me.    My nephew took the machine for granted and has simply accepted the fact that computers are now a way of life. He plays with them and does his homework on them and even creates programs for them. I , on the other hand, are terrified by what this equipment can do. It can interchange paragraphs, switch words around and even correct my spelling. It informs me of Its limitations, takes commands and asks questions. It even seems to have a sense of communication. Rather than accusing me of making an error, it prints “One of us has made a mistake!” It never gets tired and is always patient and ready to go when I am.    I think it was somewhat normal for me to be suspicious of computers. They represent a break with some very familiar habits and traditions. It is only human to instinctively avoid anything that shifts thoroughly from the acceptable, comfortable past. But the world is governed by ceaseless change and we must therefore establish links with the present and future as well as the past. Computer technology is an excellent case in point, as the newest systems grow out of date in only a few years, or even months.    This ability to see, experience and accept the new is one of our saving characteristics. To be fearful of tomorrow, to close ourselves to possibilities, to resist the inevitable, to advocate standing still when all else is moving forward, is to lose touch. If we accept the new with joy and wonder, we can move gracefully into each tomorrow. More often than not, the children shall lead us. 6．What is the new meaning of  “So simple a child can do it” for the author? A．computers are so easy to operate that even a child can play them well B．A child can always do more complex things than an adult. C．It is easier for a child to accept new things than for an adult. D．A child has greater ability than an adult in operating computers. 7．According to the second paragraph, which of the following statements is true? A．The nephew thought it is natural to accept the fact that computers are now a way of life. B．The nephew believed that machines were made for people to do whatever they wanted. C．computers are not only used to communicate, but also to remove their limitations. D．It is a fact that both adults and children have accepted computers as a way of life. 8．Which of the following doesn’t the author’s computer do ? A．It asks the author if she has made a mistake. B．It accuses the author of making mistakes. C．It corrects the author’s spelling mistakes. D．It informs the author of her mistakes. 9．According to the third paragraph, it is human nature that we resist those things which    A．only represent the comfortable and acceptable past B．change thoroughly into the comfortable and acceptable past C．make people stand still when all else is moving forward D．change completely from the acceptable and comfortable past 10．How do you understand the underlined sentence in the  text? 　　A. It is always ready to inform me when I am ready to go. 　　B. It is always ready to start working when I am ready for work. 　　C. When I am ready to go, it is patient to wait. 　　D. When I am ready to go, it has already gone.