某种碱式碳酸铜是一种绿色固体粉末,其组成可表示为:Cu2(OH)2CO3·xH2O,

题型:填空题

问题:

某种碱式碳酸铜是一种绿色固体粉末,其组成可表示为:Cu2(OH)2CO3·xH2O,在加热条件下,它在失去结晶水的同时发生分解,反应方程式为:

现取一定量的固体样品,不准确称量其质量,用两套仪器装置,先后进行两个实验:

实验(Ⅰ):测定该碱式碳酸铜粉末组成中x的值;

实验(Ⅱ):用实验(Ⅰ)结束后的残留固体与乙醇蒸气反应,并检验反应产物。

试回答下列问题:

现已装配好上面一套仪器装置(装置中必要的铁架台、铁夹、铁圈、酒精灯、石棉网在图中已略去),这套装置是用来完成上述实验()的(填标号)。

考点:教师招聘考试中学教师招聘笔试湘潭市教师公开招聘考试中学化学真题2006年2
题型:填空题

提示左心衰竭,最有意义的体征是

A.心脏杂音
B.心律不齐
C.心尖区可及舒张期奔马律
D.肺部可及哮鸣音
E.心率加快

题型:填空题

高速走丝电火花线切割机床的走丝速度一般为()。

A.8~12mm/s

B.80~100mm/s

C.0.8~1.2m/s

D.8~12m/s

题型:填空题

治疗最佳方剂是:

A.苍附导痰丸

B.血府逐瘀汤

C.人参养荣汤

D.八珍益母丸

E.归肾丸

题型:填空题

No blueprint exists for transforming an economy from one with a great deal of government control to one based almost solely on free market principles. Yet the experience of the United Kingdom since 1979 clearly shows one approach that works: privatization, in which under-performing state-owned are sold to private companies.

By 1979, the total amount of debt, liabilities, and losses for state-controlled enterprises in the UK topped 3 billion annually. By selling off many of these companies, particularly those in the depressed industrial sector, the government decreased its debt burden and ceased pumping public funds into money losing enterprises. According to government spokesperson Alistair McBride, "Far from past practice of throwing good money after bad, the Queen’s government this year expects to take in 34 billion from the proceeds of the sale." That, say some analysts, may only be the beginning. Privatization has not only been credited with rescuing whole industries but the nation’s economy to boot.

Due to increased tax revenues from the newly privatized companies along with a rebound in the overall economy, economic forecasters predict that Britain will be able to repay nearly 12.5% of the net national debt within two years. That is good news indeed for the economy as a whole at a time when many sectors are desperate for any ray of sunshine. British Airways this week announced a 20% jump in overall ticket sales and profits over this quarter a year ago. British Gas announced its first profitable quarter in nine years. At Associated British Ports, a new labor contract was finalized, the first union contract signed at the port without a work stoppage in twelve years. Closer to home for most Britons, the nation’s phone service, British Telecom, no longer puts new subscribers on a waiting list. Prior to privatization, new customers would sometimes have to wait months before phone service could be installed in their home. Now, according to a company press release, British Telecom is promising 24-hour turnaround for all new customers.

Part of this improved productivity has to do with new efforts to allow employees to hold a stake in the company’s future. Companies now give their employees stock options that allow employees to share in the company’s success (and profits). The response has been enthusiastic to say the least. At British Aerospace; 89% of those eligible to buy company shares did so. At British Telecom nearly 92% of eligible employees took part. Finally, at Associated British Ports, long synonymous with union disagreements, walkouts, and labor strife, almost 90% of employees now can call themselves owners of the company.

"When people have a personal stake in something," said Henry Dundee of Associated British Ports, "they think about it, they care about, they work to make it prosper." At the National Freight Consortium, itself no stranger to labor problems, the new employee-owners actually voted down an employee pay-increase and, pressured union representatives to relax demands for increased wages and expanded benefits. "Privatization was only the start," says one market analyst, "what we may have here is a new industrial revolution.\

The best title for the text might be()

A.Privatization is a Double-edged Sword

B. Privatization is a Way out for UK’s Economy

C.Privatization Makes Government the Winner

D. Privatization Offers a Promising Future

题型:填空题

关于驾驶员的驾驶习惯与车辆燃料消耗的说法正确的是()。

A.频繁加速和制动使燃料消耗增多

B.长时间怠速运转燃料消耗较多

C.频繁变换挡位燃料消耗显著增加

D.频繁起步燃料消耗增加

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