题干

已知NH3和HCl都是能用来做喷泉实验的气体.若在同温同压下用等体积烧瓶一个收集满NH3,另一个收集HCl和N2的混合气体,如图所示.喷泉实验停止后,两个烧瓶内溶液的关系是(不考虑烧瓶内溶质的扩散,氨水的溶质按NH3计算)(   )

A:溶质的物质的量浓度相同、溶质的质量分数不同

B:溶质的质量分数相同、溶质的物质的量浓度不同

C:溶质的物质的量浓度和溶质的质量分数都不同

D:溶质的物质的量浓度和溶质的质量分数都相同

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答案(点此获取答案解析)

A

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完形填空

    Maria Mitchell was born in 1818 during a time when many people thought that woman did not need to learn . But , Mitchell's father thought that both boys and girls should go to school .1 he tutored her at home as well as sent to her to school .

    Mitchell's father , recognizing her interest in astronomy (天文学) at early age , encouraged her interest and taught her how to use a telescope . As an 2 she worked as the first librarian at the Nantucket Atheneum library from 1836to 1856 , all the while still looking at the sky at night , studying the stars and the planets.

    In October 1847, Mitchel saw a bright star through the telescope . She was sure that she had 3seen that star before. Excited , she ran to tell her father . She carefully wrote notes about the star. The next night , it looked as if the” star” had 4It also seemed to have a tail (尾巴)!Now , Mitchell was sure that she had found a comet , not a star.

    At eh time , the king of Denmark was offering a prize to the first person to find a comet that could only be seen through a telescope . Mitchell won the prize! It was a gold medal . But , she won something else too . She won people's respect when they saw that she was 5her work . Later , the American Academy of Arts and Sciences voted her in as its first female member .

    In 1856, a new college just for women opened . It was called Vassar College , and Mitchell became a professor there . She was the first female professor to teach astronomy , or the science of stars and planets . Because of her , female students learned that they could be scientists too . Women could make valuable 6to help understand our world .

同类题4

阅读材料,回答问题。

材料一:智能手机已成为人们使用频率非常高的通讯、娱乐工具。 2015年一季度,中国智能手机销量首次出现环比下跌,市场饱和的预警骤然拉响。2016年第一季度,在中国市场上市的智能手机新机型多达274款,也就是说平均每天有三款新智能手机在中国市场上市。厂商的急功近利也带来了产品质量存在瑕疵、行业同质化竞争严重、服务质量难以令人满意等。

一份调查报告结果显示,品牌、功能种类、处理器性能成为当下影响人们购买手机的重要指标,价格实惠,品质较好的高性价比智能手机成为人们的首选。国人对于品牌的认可程度逐渐增强,这也使得越来越多的小品牌生存逐渐困难,面临倒闭的危险。

材料二:面对不断压缩的利润空间,智能手机行业进入了一个极其艰难的处境:国内大部分厂商仅仅完成了手机的设计、制造、组装、销售与售后等环节,主要芯片等元件与操作系统仍然垄断在国外厂商的手中,而大打价格战更是令智能手机市场陷入泥潭。

面对这样的行业大背景,智能手机厂商们也在挖空心思的想招出招,不求破局,只求生存,除了常规招式外,低俗营销炒作、互相诋毁谩骂等众多新玩法也屡屡上演,真可谓无所不用其极。

结合材料,运用经济生活的有关知识,为我国智能手机企业的发展提出合理建议。