My name is Li Li. I’m eleven. I’m from China. My mum and dad work in a big factory. They go to work every day but rest two days. I have a sister. We look like each other very much and we like to help each other. She is a middle school student and comes home in the afternoon. Everyone in my family likes to look after me.
My sister and I are in the same school. I’m a good student in my class. There are forty-two students in our class, twenty boys and twenty-two girls. We have our lessons from eight o’clock in the morning to four o’clock in the afternoon. My teacher of English, Miss. Green is from England. She is a good teacher. We go to school from Monday to Friday .We have five English classes a week. Now we can say a hundred words, and play games in English. We like English. We like our English teacher.
【小题1】Li Li’s family has people.
A.three | B.four | C.six | D.five |
A.seven days | B.five days | C.six days | D.four days |
A.an American | B.a Japanese | C.an English woman | D.a Chinese |
A.a good teacher | B.a nice girl | C.a bad student | D.a good worker |
A.one English class | B.six English classes |
C.no English class | D.five English classes |
实验室里不同化学试剂的保存方法不尽相同,①NaOH溶液 ②大理石 ③NaCl溶液④稀硝酸4种试剂通常各自存放在下列图示的某种试剂瓶中。按照试剂瓶的顺序存放试剂序
号正确的是
号正确的是
A.①②③④ | B.②①④③ | C.②③④① | D.②①③④ |
下列有关实验设计方案或实验事实的叙述错误的是
A.将Fe(OH)3加入到滴有酚酞试液的蒸馏水中,溶液显红色 |
B.向硫酸铜溶液中滴加氢氧化钠溶液有蓝色絮状沉淀 |
C.打开盛放浓盐酸的瓶塞,会产生大量白烟 |
D.向氯化钙溶液中通入二氧化碳不会出现白色沉淀 |
下列各种叙述都是错误的,请你举一反例证明它是错误的:
0 53236 53244 53250 53254 53260 53262 53266 53272 53274 53280 53286 53290 53292 53296 53302 53304 53310 53314 53316 53320 53322 53326 53328 53330 53331 53332 53334 53335 53336 53338 53340 53344 53346 53350 53352 53356 53362 53364 53370 53374 53376 53380 53386 53392 53394 53400 53404 53406 53412 53416 53422 53430 211419
错误的叙述 | 实 例 |
例:组成元素相同的物质一定是同种物质 | CO 和CO2都是由碳、氧元素组成,却是两种不同的物质。 |
盐的水溶液都显中性 | |
单质与化合物发生的反应都是化合反应 | |
同一物质中相同元素的化合价必定相同 | |
含有氧元素的化合物一定是氧化物 | |