【2019 •湖北省黄石市】—Do you know Hong Kong-Zhuhai-Macao Bridge(港珠澳大桥)?
—Yes, it is ____cross- sea bridge in the world.
A. the longer B. longest C. the longest D. longer
2019年10月1日,是中华人民共和国成立70周年,为庆祝新中国七十华诞,在天安门广场举行了盛大的阅兵典礼。观看了中华人民人民际国70周年大阅兵,你的感想是
①中华民族迎来了从站起来、富起来到强起来的伟大飞跃
②我们要坚定信心,在建国一百年之际实现全面脱贫目标
③七十年的辉煌成就充分说明了中国发展超越了初级阶段
④我们要努力学习,为实现中华民族伟大复兴贡献力量
A.①② B.②③ C.①④ D.③④
A 、 B 是不含结晶水的两种固体物质,溶解度曲线如图所示,请回答下列问题:
( 1 )温度为 _____ (填 “t 1 ℃” 或 “t 2 ℃” )时, A 、 B 溶解度相等;
( 2 ) t 2 ℃ 时, A 的饱和溶液中溶质 A 的质量分数为 _____ (精确至 0.1% );
( 3 ) t 1 ℃ 时,用固体 A 配制溶质质量分数为 5% 的 A 溶液的步骤是:计算、称量、量取、 _____ 、转移装瓶等操作。
( 4 ) t 1 ℃ 时,要使一瓶接近饱和的 B 溶液变为饱和溶液采取的措施是 _____ (任写一种)。
( 1 )已知 ,求
的最小值;
( 2 )已知 ,求
的最大值;
( 3 )设 ,
,
,求
最小值 .
How to fight against COVID-19(新冠病毒)?We choose some books to help you. The books were translated into 13 languages, including Japanese, French and Russian. They are convenient for readers to enjoy.
| Virus, Virus, You Cannot Scare Me! (Writer: Mu Xiangzhen) The book makes parents and children be able to learn—in a fun way—about how viruses(病毒)spread and what people can do to protect themselves. It tells children not to fear about viruses. Besides, it also introduces the idea of getting well with nature, and hopes children can protect wild life and the natural environment. |
| A Special Spring Festival (Writer: Gao Jing) This book pictures children's special Spring Festival in China during the outbreak of COVID-19. It tells a story of a common family in China. It tries to answer the child/s question "Why can't I be allowed to play outside?" It tells the child what COVID-19 is, how it spreads, and how we can protect ourselves from it. The pictures show love between family members, friends and everyone. |
| Ten Tips to Fight Monsters (Writer: Dong Ruihan) Dad leaves 10 tips to help us fight the virus. Who will win the war? The story will gently teach children how to prevent the disease (疾病)in a language that they can easily understand. It will help kids remain calm in the hard time, and encourage them to help family members to prevent the disease. |
| A Brief History of Viruses for Children (Writer: Changsha White-flag Dolphin Children's Book Workshop) This storybook tells the beginning of the virus, so the readers can understand the history of the virus easily. The book sets up a "Ten Questions about COVID-19" section, which explains the knowledge of COVID-19(including how it spreads), helping children readers to understand the virus basing on (基于)reason and science. |
51. All the four books are about ________________.
A. children's daily activities
B. ten questions about COVID-19
C. fighting against COVID-19
D. love between family members, friends and everyone
52. If you want to know the beginning of the virus, you can read ____________.
A. Virus, Virus, You Cannot Scare Me!
B. A Special Spring Festival.
C. Ten Tips to Fight Monsters.
D. A Brief History of Viruses for Children.
53. Which writer hopes children can protect wild life?
A. Mu Xiangzhen.
B. Gao Jing.
C. Dong Ruihan.
D. Changsha Whiteflag Dolphin Children's Book Workshop.
54. The spread of the virus is mentioned in __________________.
①Virus, Virus, You Cannot Scare Me! ②A Special Spring Festival
③Ten Tips to Fight Monsters ④ A Brief History of Viruses for Children
A. ①②③ B. ①②④ C. ①③④ D. ②③④
55. According to the passage, which one is NOT true?
A. The books were translated into many languages.
B. Children can do something to protect themselves.
C. We can understand the virus basing on reason and science.
D. We have won the war against COVID-19 completely.
右边漫画的作者,创作此画的意图是想揭示 ( )
①个人和集体的关系 ②团结的力量 ③逆境的意义 ④团队的价值
A. ①②③ B. ①③④
C. ②③④ D. ①②④
如图所示,甲、乙两个透明容器中密封着等量的空气,两个容器中的电阻丝串联起来接到电源两端一段时间后,______(填“甲”或“乙”)容器连接的U形管液面高度差较大,实验表明电流通过导体产生的热量跟______(填“电流”或“电阻”)有关;图中的U形管______(填“是”或“不是”)连通器。
仔细观察下面的中国古代史年代尺,图中符号所代表的明朝的应该是
A . ①
B . ②
C . ③
D . ④
“沙是散的,堆积起来就是无垠的沙漠;水是散的,积聚起来就是辽阔的海洋;风是散的,汇聚起来就是威力无边的风暴。”由此可见,个人与集体的关系是( )
①个体离开集体可以更好地发展
②个人与集体互不相干
③集体离不开个体而存在
④个体只有依靠集体才有无穷的力量
A.①③ B.②③ C.①④ D.③④
风暴潮是2019年我国海洋灾害中造成直接经济损失最严重的灾害。读“2019年沿海各省区风暴潮灾害直接经济损失比重图”,完成下面小题。
26. 2019年受风暴潮灾害影响,经济损失最严重的两个省区的的简称分别是( )
A. 浙、冀 B. 鲁、冀 C. 浙、鲁 D. 桂、辽
27. 防御风暴潮灾害应该采取的措施是( )
A. 鼓励围海造田,扩大陆地面积 B. 严禁污水排入,防止海洋污染
C. 禁止沿海捕捞,保护渔业资源 D. 保护海岸生态,修建护岸工程
(增强自主创新 促进国家发展)
材料一 2020年中国与创新型国家科技创新情况对比表
国家 | 创新能力排名 | 科技进步贡献率 |
中国 | 14 | 60% |
美国 | 1 | 80% |
创新型国家 | | 70% |
材料二 襄阳市科技馆在春节、 “五一”期间开展了丰富多彩的主题科普活动和各项科学实验,广大市民积极参与,大人孩子共同体验了科学的奇妙与欢乐。
材料三 星河灿烂,北斗闪耀。 2020年6月23日,我国北斗三号全球卫星导航系统最后一颗组网卫星发射成功。由55颗卫星组成的北斗导航系统,是目前全球卫星数量最多、定位精度最高、定位速度最快的导航系统,是当之无愧的大国重器。
( 1 )从材料一图表中的信息可以得出哪些结论?
( 2 )上述材料体现了我国的哪些发展战略?
( 3 )世界上已有美俄两大成熟的卫星导航系统,中国为什么还要自主开发北斗卫星导航系统?
公交车后门左右扶杆上各有一个按钮,每个按钮相当于一个开关,当乘客按下任一按钮,驾驶台上的指示灯都会亮,提示司机有人下车,如图所示的电路设计能实现上述要求的是( )
A . B .
C .
D .
关于人类的起源和进化的叙述, 错误 的是( )
A .人类起源于森林古猿 B .人类的起源与环境变化密切相关
C .人类出现的标志是直立行走 D .人类首先掌握技能是使用文字
科学立法、严格执法、公正司法、全民守法是新时代我国法治建设的基本方针,这一方针涵盖了立法、执法、司法、守法四个环节。针对四个环节,下列内容具有一致指向的是( )
①法律的力量,源自人民的信仰 ②公正的法律,不限制好的自由
③法律的运转,依靠强硬的手段 ④极端的法律,就是极端的不公
A . ①② B . ①③ C . ②④ D . ③④
阅读图文材料,完成下列问题。
近年来,随着经济的快速发展,我国已成为全球最大的石油消费国和进口国。下图为我国汕气资源主要进口源地及运输路径图。
(1)甲海峡是我国从西亚,非洲运输油气的重要通道,其名称是____海峡。
(2)一艘油轮从乙地出发,前往我国沿海某港口,将依次经过①____洋一②____运河一③____洋,最后抵达目的地。
(3)我国油气资源来源地中,④国名称是____,⑤国名称是____,⑥国所在的大洲是______洲,⑦国位于东、西半球中的____半球。
(4)乙地气候类型是____气候。
水是生命之源。如图为电解水的实验装置,下列说法正确的是
A. 该实验可用于研究水的组成
B. 正极所连的电极上产生的是氢气
C. b中产生的气体可支持燃烧
D. 实验过程中漏斗内液面高度不变