要彻底解决“物不知数”的问题,可采用下列哪种方法()A、单因子构件凑成法B、筛法C、

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问题:

要彻底解决“物不知数”的问题,可采用下列哪种方法()

A、单因子构件凑成法

B、筛法

C、公倍数法

D、公约数法

考点:数学数学史数学史题库
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驾驶机动车超车后立即开启右转向灯驶回原车道。

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建立一个学生信息表student,要求它由学号sno,姓名sname,性别sex,年龄age,4个属性组成,其学号属性唯一,学号、姓名字段不能为空。下列语句正确的是

A.CREATE TABLE student (sno char(5)NOT NULL sname char(8)NOT NULL sex char(1) age in;

B.CREATE TABLE student (sno char(5)NOT NULL UNIQUE sname char(8) sex char(1) age in;

C.CREATE TABLE (sno char(5)NOT NULL UNIQUE sname char(8)NOT NULL sex char(1) age in;

D.CREATE TABLE student (sno char(5)NOT NULL UNIQUE sname char(8)NOT NULL sex char(1) age in;

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沥青防水卷材采用条粘法施工长边搭接宽度为______mm。

A.80

B.100

C.50

D.90

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Prince Klemens Von Metternich, foreign minister of the Austrian Empire during the Napoleonic era and its aftermath, would have no trouble recognizing Google. To him, the world’s most popular web-search engine would closely resemble the Napoleonic France that in his youth humiliated Austria and Europe’s other powers. Its rivals—Yahoo!, the largest of the traditional web gateways, eBay, the biggest online auction and trading site, and Microsoft, a software empire that owns MSN, a struggling web portal—would look a lot like Russia, Prussia, and Austria. Metternich responded by forging an alliance among those three monarchies to create a "balance of power" against France. Google’s enemies, he might say, ought now to do the same thing.

Google announced two new conquests on August 7th. It struck a deal with Viacom, an "old" media firm, under which it will syndicate video clips from Viacom brands such as MTV and Nickelodeon to other websites, and integrate advertisements into them. This makes Google the clear leader in the fledgling but promising market for web-video advertising. It also announced a deal with News Corporation, another media giant, under which it will pro-vide all the search and text-advertising technology on News Corporation’s websites, including My Space, an enormously popular social-networking site.

These are hard blows for Yahoo! and MSN, which had also been negotiating with News Corporation. Both firms have been losing market share in web search to Google over the past year—Google now has half the market. They have also fallen further behind in their advertising technologies and networks, so that both make less money than Google does from the same number of searches. Safa Rashtchy, an analyst at Piper Jaffray, a securities firm, estimates that for every advertising dollar that Google makes on a search query, Yahoo! makes only 60-70cents. Last month Yahoo! said that a new advertising algorithm that it had designed to close the gap in profitability will be delayed, and its share price fell by 22% , its biggest-ever one-day drop.

MSN is further behind Google than Yahoo! in search, and its parent, Microsoft, faces an even more fundamental threat from the expansionist new power. Many of Google’s new ventures beyond web search enable users to do things free of charge through their web browsers that they now do using Microsoft software on their personal computers. Google offers a rudimentary but free online word processor and spreadsheet, for instance.

The smaller eBay, on the other hand, might in one sense claim Google as an ally. Google’s search results send a lot of traffic to eBay’s auction site, and eBay is one of the biggest advertisers on Google’s network. But the relationship is imbalanced. An influential re-cent study from Berkeley’s Haas School of Business estimated that about 12% of eBay’s revenues come indirectly from Google, whereas Google gets only 3% of its revenues from eBay. Worst of all for eBay, Google is starting to undercut its core business. Sellers are setting up their own websites and buying text advertisements from Google, and buyers are using its search rather than eBay to connect with sellers directly. As a result, "eBay would be wise to strike a deep partnership with Yahoo! or Microsoft in order to regain a balance of power in the industry," said the study’s authors, Julien Decot and Steve Lee, sounding like diplomats at the Congress of Vienna in 1814.

Google wins an advantage over MSN in that()

A. Google offers a more powerful search tool than MSN

B. Microsoft are better at designing such software as Windows

C. MSN has some unquenchable technical loopholes in its software

D. users can perform certain tasks for free with Google’s support

题型:单项选择题

对流脑的预后,正确的叙述有()

A.暴发型预后较差

B.小于1岁及高龄病人预后较差

C.流行高峰时预后较好,末期则较差

D.反复惊厥、持续昏迷者预后较差

E.治疗较晚和治疗不彻底者预后不良

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