题目

（1） Ⅰ.现有以下物质:①NaOH ②Cu③BaCO3④Fe(OH)3胶体⑤酒精⑥CO2⑦稀硫酸以上物质中属于混合物的是(填序号,下空同),属于电解质的是。 （2） 向④中逐滴滴加⑦,可观察到的现象是。 （3） Ⅱ.虽然分类的方法不同,但四种基本反应和离子反应、氧化还原反应之间也存在着一定的关系。 如图为离子反应、氧化还原反应和置换反应三者之间的关系,其中表示离子反应的是(填字母)。 （4） 有同学认为所有酸碱中和反应均可表示为H++OH-=H2O。Martin Lynch, an American businessman, had been going on vacation to a small Mexican fishing village for a number of years. One morning while going for a walk along the beach, he saw his friend Pablo Perez, a local fisherman. Martin watched Pablo unload his boat and pack the fish in a box. ?? Martin noticed Pablo was smiling and looked very happy. He could also see several large fish in the boat. Martin greeted Pablo and asked how long it took to catch the fish. “Just a few hours,” replied Pablo. Martin asked, “Why didn’t you stay longer and catch more fish?” “I have enough for my family,” Pablo said. “And what do you do with the rest of your day?” asked Martin. “I take a nap, play with my children, spend time with my wife, and go into the village to see my friends and play cards, I have a full and busy life.” Martin explained that if Pablo worked longer hours and caught more fish, he could make more money. With the extra money, Pablo could buy more boats and catch money more fish. By selling the fish, Pablo could open his own factory and sell direct to supermarkets. ?? “Then what?” asked Pablo. “Well you would probably have to move to Mexico City to run the business. Finally, you would be able to sell your business and make millions of dollars,” replied Martin. “How long will that take?” asked Pablo. ?? Martin thought for a while and said it would probably take at least 15 years. ?? “And then what” asked Pablo. ?? “Well, that’s the best part,” Martin said. “You will be able to retire, Buy a house near the ocean, sleep longer, play with your children, spend more time with your wife, see your friends, and play cards.”1.What makes the Mexican fisherman happy is ______________. A. many friends to visit him????????????? ????????????? ????????????? B. a full and busy life C. more boats and more fish ????????????? ????????????? ????????????? D. the house near the ocean 2.How can the fisherman make more money in the businessman’s view? A. By buying a supermarket. ????????????? ????????????? B. To move to Mexico City. C. By selling his own business. ????????????? ????????????? D. To work longer and catch more fish. 3.The underlined word “unload” in the passage means ____________. A. put … into?????????????? B. take … away from C. break down?????????????? D. set off4.We can infer from the passage that ____________. A. the fisherman will stay the same with his life B. the fisherman will leave the village for Mexico City C. the business man will buy the fisherman’s boat D. it takes all day for the fisherman to catch large fish