问题 选择题

下列说法不合理的是

A.FeCl3、Na2O2、CuS均可由相应单质直接化合生成

B.在稀硫酸中加入铜粉,铜粉不溶解,若加入KNO3固体,铜粉溶解

C.“溶洞”的形成过程中发生了碳酸钙与水、CO2的反应

D.氢氧化铝、碳酸铵都既能与盐酸反应,又能与氢氧化钠溶液反应

答案

答案:A

题目分析:A、铜和单质硫化合生成Cu2S,得不到CuS,A不正确;B、铜在金属活动顺序表中排在氢的后面,不能和稀硫酸反应。由于在酸性条件下NO3具有强氧化性,能氧化铜方式氧化还原反应,所以在稀硫酸中加入铜粉,铜粉不溶解,若加入KNO3固体,铜粉溶解,B正确;C、碳酸钙与空气中水、CO2反应生成碳酸氢钙,碳酸氢钙不稳定,分解生成碳酸钙,从而形成“溶洞”,C正确;D、氢氧化铝是两性氢氧化物,碳酸铵是弱酸的铵盐,因此二者都既能与盐酸反应,又能与氢氧化钠溶液反应,D正确,答案选A。

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单项选择题

Seeking to build support among black families for its education reform law, the Bush administration paid a prominent black pundit $240,000 to promote the law on his nationally syndicated television show and to urge other black journalists to do the same.
The campaign, part of an effort to promote No Child Left Behind (NCLB), required commentator Armp Williams "to regularly comment on NCLB during the course of his broadcasts," and to interview Education Secretary Rod Paige for TV and radio spots that were aired during the show in 2004.
Williams said Thursday he understands that critics could find the arrangement unethical,but "I wanted to do it because it’s something I believe in." The top Democrat on the House Education Committee, Rep. George Miller of California, called the contract "a very questionable use of taxpayers’ money" that is "probably illegal".
The contract, detailed in documents obtained by USA TODAY through a Freedom of Information Act request, also shows that the Education Department, through the Ketchum public relations firm, arranged with Williams to use contacts with America’s Black Forum, a group of black broadcast journalists, "to encourage the producers to periodically address" NCLB. He persuaded radio and TV personality Steve Harvey to invite Paige onto his show twice. Harvey’s manager, Rushion McDonald, confirmed the appearances.

The reason that this story was made known to the public was the fact that______.

A. USA TODAY requested Freedom of Information Act to act on its behalf
B. Freedom of Information Act requested USA TODAY to act on its behalf
C. USA TODAY managed to obtain copies of the documents that contained the contract
D. Freedom of Information Act so stated that USA TODAY was able to obtain the documents