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Cars are an important part of life in the United States. Without cars most people feel that they are poor. And even though a person is poor, he doesn't really feel poor when he has a car. Perhaps(可能) you have heard of Henry Ford. He first started making cars in large numbers. Perhaps he didn't know how much the car was going to be to American culture(文化). The car made the United States a nation on wheels(车轮). And it helped make the United States what it is now. The car has become popular in the United States. The Americans like to move around in cars. With a car people can go to any place without spending a lot of money. 小题1:In the United States ____. A.only rich people have cars B.no poor people have cars C.most people have cars D.only a few people have beautiful cars 小题2:Who was Henry Ford? ____. A.He was one of the famous car makers B.He was the most popular man in the USA C.He was the richest man in the USA D.He was the first car maker in American history 小题3:Henry Ford started making cars in large numbers because ____. A.he wanted to change the American culture B.he knew cars would be make only in the United States C.he thought Americans would like his cars best D.he knew more and more people would buy cars 小题4:Which of the following do you think is true? ____. A. There are too many people everywhere in the USA. B. There are a lot of cars everywhere in the USA . C. Car pollution(污染) is the biggest problem in the USA. D. Every family more or less has a car. 小题5:We can know from this passage(文章) that ____. A.cars are cheaper in the USA B.the Americans are the richest in the world C.the Americans like to move around in cars D.the USA makes the most cars
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【简答题】自然界有一种“雷雨发庄稼”的现象.雷雨时,空气中的氮气在闪电条件下与氧气化合生成不溶于水的一氧化氮气体;一氧化氮的密度比空气略大,常温下易与氧气反应生成二氧化氮;二氧化氮再与水反应,生成硝酸(HNO 3 )和一氧化氮,硝酸经过一系列的变化在土壤中生成能促进植物生长的硝酸盐. (1)空气中含量最多的两种气体是______、______. (2)试写出该氮气与氧气反应的化学式表达式______. (3...
【简答题】某地区由于经常降酸雨,导致金属被腐蚀、土壤酸化等现象.请回答下列问题: (1)在一次降雨的过程中,李明同学在不同时间段内两次采集了雨水水样,将其分别编号为①、②.用PH计(测PH的仪器)测得PH依次为4.85、4.92,将两次雨水水样相比较,酸性较强的是______ (填编号). (2)为改良该地区酸性土壤,应加入的一种碱是______. (3)写出形成酸雨的一种气体______,请写出一条防治酸...
【多选题】公差原则包括( )。
A.
独立原则
B.
包容原则
C.
最大实体原则
D.
最小实体原则
【单选题】“酸雨”现象是属于一种( )。
A.
大气污染
B.
水体污染
C.
自然灾害
D.
噪声污染
【多选题】公差原则包括( )。
A.
基本原则
B.
独立原则
C.
导出原则
D.
相关要求
【单选题】细胞是生物体结构和功能的基本单位,下列叙述中正确的是(  )
A.
大肠杆菌噬菌体没有细胞结构
B.
病毒没有遗传物质
C.
动物细胞结构中有细胞壁
D.
植物细胞中没有细胞膜和线粒体
【单选题】构成生物体结构和功能的基本单位是
A.
细菌
B.
细胞
C.
病毒
D.
组织
【单选题】下列叙述正确的是( )
A.
“雨后彩虹”是一种自然现象,与胶体的知识有关
B.
硫酸、纯碱、醋酸钠和生石灰分别属于酸、碱、盐和氧化物
C.
“通风橱”是一种负责任的防污染手段,可使有害气体得到转化或吸收
D.
长期盛放NaOH溶液的滴瓶不易打开,是因为NaOH与瓶中的C0 2 反应使瓶内气体减少形成“负压”之故
【多选题】汽车底盘包括( )。
A.
传动系统
B.
行驶系统;行走系统
C.
转向系统
D.
制动系统
【单选题】汽车 底盘包括 ( )。
A.
传动系 行驶系 转向系 制动系
B.
传动系 起动系 转向系 行驶系
C.
转向系 传动系 行驶系 冷却系
D.
传动系 行驶系 转向系 点火系
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