下列有关水的认识中不正确的是( ) A.自然界中的水都是混合物 B.过滤可使硬水

题型:选择题

问题:

下列有关水的认识中不正确的是(  )

A.自然界中的水都是混合物

B.过滤可使硬水软化

C.水是一种重要的溶剂

D.电解水时,负极上产生的气体是氢气

考点:电解水实验水的组成
题型:选择题

对蜡烛的探究实验:(1)点燃蜡烛,把一根火柴梗放在蜡烛的火焰上(如图),约1S后取出,

可以看到火柴梗在______处(填字母)最先碳化.

(2)再将一只干燥的烧杯罩在蜡烛火焰上方,烧杯内壁出现______,片刻后取下烧杯,迅速向烧杯内倒入少量澄清的石灰水,振荡后出现的现象是______.

(3)请你根据上述实验现象及质量守恒定律,推出蜡烛的组成是______.

题型:选择题

根据《医疗事故处理条例》的规定,医患双方对患者的死因有异议时,应在患者死亡后多长时间之内进行尸检,如具备冻存条件的,可以延长至多长时间

A.24小时;7天

B.48小时;5天

C.48小时;7天

D.24小时;5天

E.72小时;10天

题型:选择题

重整

题型:选择题

The iPhone, the iPad: each of Apple’s products sounds cool and has become a fad (一度时髦的风尚). Apple has cleverly taken advantage of the power of the letter “i” — and many other brands are following suit. The BBC’s iPlayer — which allows Web users to watch TV programs on the Internet — adopted the title in 2008. A lovely bear — popular in the US and the UK — that plays music and video is called “iTeddy”. A slimmed-down version of The Independent newspaper was launched last week under the name “i”.

In general, single-letter prefixes have been popular since the 1990s, when terms such as e-mail and e-commerce first came into use.

Most “i” products are aimed at young people and considering the major readers of The Independent’s “i”, it’s no surprise that they’ve selected this fashionable name.

But it’s hard to see what’s so special about the letter “i”. Why not use “a”, “b”, or “c” instead? According to Tony Thorne, former head of the Language Center at King’s College London, “i” works because its meaning has become ambiguous. When Apple uses “i”, no one knows whether it means Internet, information, individual or interactive, Thorne told BBCMagazines. “Even when Apple created the iPod, it seems it didn’t have one clear definition,” he says.

“However, thanks to Apple, the term is now associated with portability (轻便).” Adds Thorne.

Clearly the letter “i” also agrees with the idea that the Western world is centered on the individual. Each person believes they have their own needs, and we love personalized products for this reason.

Along with “Google” and “blog”, readers of BBCMagazines voted “i” as one of the top 20 words that have come to define the last decade.

But as history shows, people grow tired of fads. From the 1900s to 1990s, products with “2000” in their names became fashionable as the year was associated with all things advanced and modern. However, as we entered the new century, the trend unavoidably disappeared.

小题1:People use iPlayer to _________.

A.listen to music

B.make a call

C.watch TV programs online

D.read newspapers小题2:We can infer that The Independent’s i” is aimed at _________.

A.young readers

B.old readers

C.fashionable women

D.engineers小题3:Nowadays, the “i” term often reminds people of the products which are _________.

A.portable

B.environmentally friendly

C.advanced

D.recyclable小题4:The writer suggests that _________.

A.“i” products are often of high quality

B.iTeddy is a living bear

C.the letter “b” replaces the letter “i” to name the products

D.the popularity of “i” products may not last long

题型:选择题

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张源是一家旅游公司的旅游策划人员,在五一节即将来临之际,他制作了一份宣传九寨沟风光的演示文稿,用来吸引旅游者的眼球,有关九寨沟风景的文字资料及素材参见“九寨沟风光(素材).docx”,制作要求如下:

根据素材内容,设计4个文字链接,通过链接可以分别指向后4张幻灯片中的其中一张,同时,也为后4张幻灯片设计一个自定义的图形链接,要求图形中包含“返回”两字,单击图形可以返回到其链接过来的幻灯片中。

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