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下列相关实验方法能达到目的是（）

选项	实验目的	实验方法
A	鉴别稀硫酸和硫酸钠溶液	滴加紫色石蕊试液
B	鉴别氢气和甲烷	点燃，火焰上罩一个冷而干燥的烧杯
C	除去KCl溶液中少量的CaCl2	加入适量的碳酸钠溶液，过滤
D	除去 CO中少量的CO2	将混合气体通入溶液

根据传播途径，下列四种传染病中，配对不正确的是（      ）

晓虹是一名初一学生，成绩在班里名列前茅，晓丽是班里的“学习困难户”，平时在生活和学习中，晓虹经常给予晓丽许多帮助，什么都与她分享，两人因此成为了好朋友。最近晓虹的学习成绩一直在退步，晓丽开始有意疏远她，并告诉晓虹不想和她做好朋友了。这让晓虹心里很不是滋味。

阅读材料，回答问题

材料一：

材料二：人类能够使用和管制火，是历史上的一件大事，因为这必须是在漫长的岁月中积累了经验，有了相当的智慧才能办到的。正因为“北京人”能够如此，才进一步证明了他们对对付自然已有了一定的办法。

——贾兰坡《“北京人”的故居》

请回答：

探究不同浓度的生长素类调节剂溶液对某植物插条生根的影响，实验组的结果如下表。下列叙述错误的是(　　)

组　别	浓度a	浓度b	浓度c	浓度d
平均生根数	29	20	7	29

从 一侧运输到 一侧，需要 的协助，同时还需要消耗所释放的能量，这种方式叫做主动运输．

 

命题“”的否定是 （　　）

I get paid (每月一次地).

随着5G时代的到来，智能设备再次成为热词，感受美好生活，人工智能会给人们带来新体验。更快的数据下载速度意味着会有更多的功能被开发出来，科技创新的力量为我们描绘了美好生活蓝图。下列观点正确的是（  )

给下列多音字注音并组词。

角                     

曝                     

如图所示为卫生间感应干手机，将手伸入烘干位置时，感应干手机吹出热风；手离开后，感应干手机停止工作。感应干手机的控制系统属于（    ）

油田开采的石油中溶有一种碳氢化合物﹣﹣金刚烷，它的分子立体结构如图所示：

阅读理解

    Autism(自闭症) is a disorder of the brain that happens in the first three years of life. It affects the brain's normal development. Most autistic patients have difficulty talking with other people or doing things. However, some of the autistic people have amazing abilities. For example, some can memorize many things and some can do calculations really fast.

    Raymond Babbitt in the 1988 film Rain Man is an example. The character in the film was based on Kim Peek, a man from the USA. Peek couldn't switch on a light or put his clothes on by himself. But his memory was so amazing that he could remember almost anything. He could memorize every road, place and distance on maps. He could even remember almost every word in thousands of books. His way of reading was more amazing. Peek could read two pages at the same time in just eight to ten seconds. He read the left page with his left eye and the right page with his right eye.

    Scientists still don't know for sure why some autistic people have special talent after they have done a lot of research. There is one possible explanation. When certain parts of the brain are damaged! by autism, other parts of the brain might get stronger. Therefore special abilities were born.

    But not all people with autism have amazing abilities. In fact, autistic people with amazing abilities are rare (罕有的) and the abilities cannot be trained. According to research, only ten percent of autistic people show any signs of special talent.

根据材料内容选择最佳答案，并将其标号填涂在答题卡相应位置。

These （fireman） can't find people.

下列图案是轴对称图形的是（　　）

如果C是线段AB的黄金分割点，且AC＞BC，则有比例线段

个题变成三个题

82－6

绿肥植物是一种专门用作肥料的栽培植物，作物成熟以后，可以就地翻压，也可以异地施用，在农业生产中利用绿肥植物的目的是（   ）

下列实验操作正确的是（   ）

佩香囊是端午节传统习俗之一.香囊内通常填充一些中草药，有清香、驱虫、开窍的功效.因地方习俗的差异，香囊常用丝布做成各种不同的形状，形形色色，玲珑夺目.图1的平行四边形 由六个边长为1的正三角形构成.将它沿虚线折起来，可得图2所示的六面体形状的香囊.那么在图2这个六面体中（    ）