下列物质的制备,符合工业生产实际的是( ) A.将氯气通入澄清石灰水中制漂白粉

题型:选择题

问题:

下列物质的制备,符合工业生产实际的是(  )

A.将氯气通入澄清石灰水中制漂白粉

B.用离子交换膜法电解饱和食盐水制备烧碱、氢气和氯气

C.将氢气和氯气混合后点燃,产物用水吸收制备盐酸

D.将SO2和O2的混合气加高压后,通过接触室,制备SO3

考点:绿色化学室内空气污染海水资源的综合利用
题型:选择题

患者,女性,25岁,右足底行走时轻度疼痛,右足跖前部可见数个黄豆大小淡黄色角质栓,除去表面角质层可见有白色软刺状疣体,表面可见小黑点,最可能的诊断是

A.鸡眼

B.骈胝

C.跖疣

D.皲裂

E.肢端疼痛症

题型:选择题

排汽缸喷水降温装置在什么情况下投入?应注意什么问题?

题型:选择题

现有甲、乙两个投资项目,已知甲、乙方案的收益期望值分别为10%和25%,标准离差分别为20%和49%,则()。

A.甲项目的风险程度大于乙项目

B.甲项目的风险程度小于乙项目

C.甲项目的风险程度等于乙项目

D.无法确定甲项目和乙项目的风险程度

题型:选择题

Democrats on the Senate Judiciary Committee vented their fury over high gasoline prices at executives of the nation’s five largest oil companies on Wednesday, grilling the oilmen over their multimillion-dollar pay packages and warning them that Congress was intent on taking action that could include a new tax on so-called windfall profits. Such showdowns between lawmakers and oil titans have become a familiar routine on Capitol Hill. But with gas prices nearing $ 4 a gallon, and lawmakers headed home for a weeklong Memorial Day recess where they expect to get an earful from angry constituents, there is added urgency for Congress to appear active.

But while momentum is building for several measures, including a bill that would allow the Organization of the Petroleum Exporting Countries to be sued in American courts under antitrust laws, there is little sign that any of the proposals would do much, if anything, to lower prices quickly. And the oil executives warned that government intervention might only make things worse. Instead, they called on Congress to allow more drilling and exploration for domestic oil.

The increasing urgency to seem aggressive about gasoline prices was apparent on Tuesday when the House voted by an overwhelming 324 to 84 to approve the bill, commonly referred to as NOPEC, which classifies OPEC as a monopoly in violation of the Sherman Antitrust Act. Senate Democrats have included that measure as part of a package of legislation intended to address the high price of gasoline, along with the tax on windfall profits and a measure to tamp down speculation in the oil futures market that many lawmakers think is contributing to the run-up in prices.

At the Judiciary Committee hearing, Democratic senators struggled to have the executives explain how oil prices had risen so high. The senators expressed doubt that basic laws of supply and demand were at work and suggested instead a more sinister combination of monopolistic behavior by oil-producing countries, speculation in the futures markets and sheer corporate greed.

On Monday, President Bush signed a bill temporarily suspending the purchase of crude oil for the nation’s Strategic Petroleum Reserve. Mr. Bush had initially opposed such action but relented after the House and Senate approved the bill by wide margins. Senator Richard J. Durbin, Democrat of Illinois and a p supporter of Senator Baraek Obama’s presidential bid, made a particularly pointed attack, in which he seemed to warn the oil executives that they would soon no longer have such a good friend in the White House. He also suggested that Mr. Bush should be doing more to press the oil companies to help lower prices at the pump, while acknowledging that it would be difficult to pass a windfall profits tax while Mr. Bush was still in office.

From the text we can learn that the bill allowing OPEC to be sued under antitrust laws()

A. handicaps more drilling and exploration for domestic oil

B.is a kind of government intervention that only makes things worse

C. turns out to be less influential to decrease oil price rapidly

D.is in violation of the Sherman Antitrust Act

题型:选择题

如何正确使用转子流量计?

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