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问题 不定项选择题

某兴趣小组设计实验探究碳酸钠、碳酸氢钠与盐酸反应过程中的放、吸热情况。操作步骤为：①向试剂1中加入试剂2，搅拌、测温；②静置、测温；③再加入试剂3，搅拌、测温、记录。得到了如下数据：

则下列说法中，错误的是[ ]

A. Na2CO3在溶于水的过程中放出热量

B. NaHCO3在溶于水的过程中吸收热量

C. 其它条件相同时，碳酸氢钠溶液与盐酸混合过程中放出的热量更多

D. 实验中，若同一列试剂的温度及所取的量不同，则实验结论的可信度降低

答案

答案：C

单项选择题

German Chancellor Angela Merkel won over German voters in the Federal Election on Sept. 27. Can she now be won over by a French charm offensive (1) at repairing the relationship that was once at the heart of Europe That’s the question being asked in Paris, (2) top government officials are (3) talking about their desire to rekindle closer ties (4) their neighbors across the Rhine. (5) the end of World War II the Franco-German relationship has been the motor of European integration, the (6) force behind the creation of the European Union and, more recently, the introduction of the euro. But the ardor has (7) in this decade, particularly under Merkel, who has regularly struggled to (8) her irritation with French President Nicolas Sarkozy’s grandstanding. Sarkozy, (9) , has often been impatient with what he (10) Merkel’s lack of resolve.

The sometimes (11) personal rapport is a long way from the public shows of affection their predecessors staged, particularly Helmut Kohl and FranCois Mitterrand, who movingly held (12) in 1984 in a Verdun cemetery. There’s been tension on (13) , too. Charles Grant, director of the London-based think tank Centre for European Reform, points out that France and Germany have been (14) on issues from how best to reflate their economies during the economic (15) to the smartest strategies for dealing with Russia.

But influential movers in France are now (16) to put the relationship back on a friendlier footing. In a recent paper French think tank Institute Montaigne (17) an ambitious agenda for the two nations, (18) that a new impetus is needed if Europe’s voice is to be heard in a world (19) of big new players, such as Brazil and India, and at a time when President Obama seems fax more (20) with China and the rest of Asia than with America’s traditional allies in Europe.

16（）

A.eager

B.delighted

C.worried

D.reluctant
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单项选择题

后台监控系统中事故追忆可调出事故了生（）的所有模拟量的值，可供操作人员分析事故原因。

A、前10min；后10min

B、前5min；后10min

C、前10min；后5min

D、前5min；后5min
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