WWW浏览器是（）。A、一种操作系统 B、TCP/IP体系中的协议 C、远程登录的程

对课堂交往可能会产生影响的心理因素有（）。

A.认知障碍

B.注意的分配

C.兴趣与动机

D.交往技能障碍

进行国民经济评价应采用( )确定费用与效益。

A．市场价格

B．政府定价

C．影子价格

D．管制价格

新航路开辟后，商业地位被他国所代替的国家或地区是（）

A.意大利

B.英国

C.葡萄牙

D.西班牙

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.

According to Democratic senators, which of the following is NOT a factor contributing to soaring oil prices （）

A. The basic laws of supply and demand

B. The monopoly of oil-producing countries

C. Speculation in the oil futures markets

D. Oil companies salivating over profits

建筑消防给水系统按照灭火方式可分为( )。

A．高层建筑消防给水系统

B．区域集中消防给水系统

C．消火栓给水系统

D．自动喷水灭火系统

E．独立消防给水系统