题干

下列物质属于纯净物的是(   )

A:石油   

B:海水   

C:水银   

D:空气

上一题 下一题 0.0难度 选择题 更新时间:2018-06-07 12:01:30

答案(点此获取答案解析)

C

同类题4

阅读材料,回答问题。
材料一:1911年10月10日,辛亥革命爆发。参加过辛亥革命的老人吴玉章曾经说过
“从前皇帝自称为天子,如果有人说皇帝是强盗,可以打倒,别人一定把他看作疯子。孙中山就曾经是一个被人家看作是疯子的人。相反在辛亥革命以后,如果有人想做皇帝或者拥护别人做皇帝,一定也被看作疯子。”
材料二:在国内,只有少数学生和商人受到他(孙中山)的思想的影响,而广大民众仍
无知、冷漠。当1911年革命到来时,它在一定程度上只是一些省份的地主绅士和商业界的事。                                          ----斯塔夫里阿诺斯《全球通史》
材料三:“夫去一满洲之专制,转生出无数强盗之专制,其为毒之烈,较前尤甚。于是
而民愈不聊生矣!”                          ——摘自孙中山《建国方略·自序》
【小题1】你是如何理解“在辛亥革命以后,如果有人想做皇帝或者拥护别人做皇帝,一定也被看作疯子”的 ?(2分)
【小题2】孙中山先生曾在其《遗嘱》中表达过“革命尚未成功,同志仍需努力”的意思。请利用材料二提供的信息,说明辛亥革命不能成功的的主要原因。(2分)
【小题3】请具体说明孙中山先生所描述的革命后的中国社会现实,并由此解释新文化运动
兴起的必要性。(2分)

同类题5

阅读理解

    Open work spaces definitely have their benefits,but they come with the drawback of offering employees little to no control over visual distractions(干扰).With so many people around and so much going on,some of us can easily get disturbed by this information overload and lose focus in what's really important.That's where the Focus Cap comes into play.

    “As we are still cavemen or mammals kept in an unnatural environment,I believe that only by reclaiming(收回)the normal,stress-free human state through simple tools and techniques can we finally release our actual creative potential and create our meaningful work for a brighter future,”says German designer Hannes Greblin,inventor of the Focus Cap.

    After looking at other products designed at minimizing visual distractions,Greblin decided that most of them were either too expensive or too uncomfortable to become mainstream,so he decided to go with something much simpler —a simple cap with a retractable visor(可伸缩的帽沿).

    Greblin's Focus Cap is really straightforward.You just wear it like a regular cap'with the sides of the visor retracted,and just collapse the sides whenever you need to focus on what's ahead of you.Whether you're trying to focus on a task in an open work office.Trying to study at university,or practicing yoga in a park and trying to ignore stares from strangers,the Focus Cap can help.

    To be honest,this whole project sounds like a joke,but the Focus Cap does have its own website where people interested in this unusual accessory can actually sign up for updates on when it will go on sale.Greblin claims it will cost 30 euros($37)plus shipping.