题目

下列事实能说明氨水是弱电解质的是： A、氨水与氯化铝溶液反应产生氢氧化铝沉淀 B、用氨水做导电实验，灯泡很暗 C、0.1mol/L的氨水的pH<13 D、氯化铵溶液的pH<7 答案：CD 解析: 略Mr. and Mrs. Jackson and their children Larry and George went to Big Mountains by car for Thanksgiving. Soon Father stopped the car. “Here we are！” he said.There was a large house in front of them with a big chimney(烟囱) at the back wall. Behind the house on the left, there was a small apple garden and on the right there were big trees.When Father gave the children the keys, they jumped out of the car, ran to the house to open the door and went in. There was a large sitting room and a kitchen downstairs. There was a big fireplace in the corner of the room. The kitchen was small but nice with a fridge at the left wall. They began to clean the house and then put the food in the fridge. Then they went for a long walk into the forest.The family came back much later and Larry shouted, “Our front door is open！” They came in and went into the kitchen. “The fridge is open！” shouted George. “And there is no fish or fruit in the fridge，” Mother said.“I know what happened. While we were out we had our food stolen，” said Mr. Jackson. “I'm going to call the police.”Soon the police officer came. He looked everywhere in the house and in the garden. Then he looked up at the chimney.“Start a fire in the fireplace，” said the policeman. “Then come out to watch your chimney.”Mr. Jackson started a fire in the fireplace. Suddenly out jumped a little raccoon(浣熊) from the chimney to a tree and was gone. “I can't believe my eyes. How cute it is！” said Mr. Jackson.“Now you know who stole your food，” said the policeman.1.Why did the Jackson family go to Big Mountains?A. To take apples home.B. To see animals.C. To spend their holiday.D. To visit their friends.2.What did the Jackson family do after they put the food in the fridge?A. They took a walk.B. They cleaned the house.C. They had a meal.D. They watered apple trees.3.The policeman asked Mr. Jackson to start a fire to ________．A. cook some foodB. keep them warmC. warn the animal to run awayD. drive the raccoon out4.How did Mr. Jackson feel when he saw the raccoon?A. Angry. B. Surprised.C. Nervous. D. Scared. 1.C 2.A 3.D 4.B 【解析】短文讲述的是Jackson夫妇带着他们的孩子去Big Mountains（大山）的房子去过感恩节的故事。介绍了他们在那里所进行的一些活动以及所发生的故事。 1.细节理解题。根据第一段第一句Mr. and Mrs. Jackson and their children Larry and George went to Big Mo...