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问题 填空题

（1）小李在学校实验室里，发现两瓶失去标签的溶液（标记为A、B），经询问实验员得知是稀硫酸和小苏打溶液。为了区分它们，小李进行了如下实验，请你协助他完成相关问题的解答：

①向A、B两溶液中分别加入适量纯碱，观察到A中有大量气泡，B中没有明显变化现象。A溶液中发生反应的化学方程式是：_____________________________。

②向A、B两溶液中分别投入生锈的铁钉，观察的到A溶液逐渐变为黄色，铁钉表面有气泡产生，B中没有明显变化现象。则A中所发生化学反应的基本类型有____________________________

③向A、B两溶液中分别加入盐酸， A中没有明显变化现象，B中的现象是____________________________

（2）A是一种常见液体，B是最清洁的燃料，它们与C、D、E、F几种物质按下图所示流程进行转化（部分反应条件略去），请按下列要求填空

物质D的名称是______________，转化④中碱的化学式是______________转化①的化学方程式是____________________________，转化②的化学方程式是____________________________

答案

（1）①H2SO4+Na2CO3==Na2SO4+CO2↑+H2O；②复分解反应和置换反应；③溶液中有气泡产生

（2）稀盐酸；KOH；2H2O2H2↑+O2↑；2KClO32KCl+3O2↑

单项选择题

In WAR MADE EASY Norman Solomon demolishes the myth of an independent American press zealously guarding sacred values of free expression. Although strictly focusing on the shameless history of media cheerleading for the principal post World War II American wars, invasions, and interventions, he calls into question the entire concept of the press as some kind of institutional counterforce to government and corporate power.
Many of the examples compiled in this impeccably documented historical review will be familiar to readers who follow the news on the Internet. But such examples achieve fresh impact because of the way Solomon has organized and analyzed them. Each chapter is devoted to a single war hawk argument ("America Is a Fair and Noble Superpower," "Opposing the War Means Siding with the Enemy," "Our Soldiers Are Heroes, Theirs Are Inhuman"), illustrated with historical examples from conflicts in the Dominican Republic, E1 Salvador, Vietnam, Grenada, Panama, Kosovo, both Iraq wars, and others in which the media were almost universally enthusiastic accomplices.
The book should really be subtitled "War reporting doesn’t just suck, it kills. "it makes you feel like demanding a special war crimes tribunal for corporate media executives and owners who joined the roll-up to" shock and awe" as non-uniformed psywar ops. To be sure, this would raise the issue of whether or not following orders might suffice for the defense of obedient slaves such as Mary McGrory and Richard Cohen, who performed above and beyond the call of duty. "He persuaded me, " ncGrory gushed(热情洋溢地表达) the morning after Colin Powell addressed a plenary session of the United Nations on February 5, 2003, declaring that Iraq had weapons of mass destruction. " The cumulative effect was stunning. "In the same Washington Post edition, Cohen wrote.
The evidence he presented to the United Nations—some of it circumstantial, some of it absolutely bone-chilling in its detail—had to prove to anyone that Iraq. not only hasn’t accounted for its weapons of mass destruction but without a doubt still retains them. Only a fool—or possibly a Frenchman—could conclude otherwise.
Solomon demonstrates how this kind of peppy prewar warm up degenerates into drooling and heavy breathing once the killing begins. As if observing a heavy metal computer game, the pornographers of death concentrate on the exquisite craftsmanship and visual design of the murder machines and the magnificence of the fiery explosions they produce.

Solomon mentioned the computer game in order to ______.

A．blame the press for its guilt in the war

B．compare the prewar preparations and the real war

C．stress the large scale of mass destruction

D．describe the visual effects of the murder machines
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选择题

如图所示，倾角为θ的固定斜面上有一个固定竖直挡板，在挡板和斜面之间有一个质量为m的光滑球，球对斜面和挡板的压力大小分别为

A．mgcosθ和mgsinθ

B．mgsinθ.和mgcosθ

C．mg/cosθ和mgtanθ.

D．mgcotθ和mgcosθ.
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