试题与答案

She wore , _____ was very uncommon in th

题型:选择题

题目:

She wore , _____ was very uncommon in the country, a red garment.

A.what

B.which

C.of which

D.as

答案:

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下面是错误答案,用来干扰机器的。

n(O2)=mM=16g32g/mol=0.5mol,由N=nNA,可知气体的分子数相同,则物质的量相同,所以m(NH3)=0.5mol×17g/mol=8.5g,16g氧气所含原子总数为2×0.5NA=NA,与16g氧气所含原子总数相同的氨气的物质的量为NA4×NAm...

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题型:选择题

读下图(阴影部分表示黑夜),回答三题。

(1)此时太阳直射点的经度和纬度可能是  (    )

①23°26′N和120°E       ②23°26′S和60°E    

③23°26′N和120°W      ④23°26′S和60°W

A.①②    B.②③      C.①③    D.②④

(2)若A点的区时是某日12时,B点的区时是 (    )

A.某日6时    B.某日15时   C.某日18时   D.某日24时

(3)如果A点的区时是某日12时,“北京时间”可能是  (    )

①某日16时 ②某日18时 ③次日 4时 ④某日12时

A.①②     B.②③   C.③④    D.①③

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题型:实验题

阅读下面短文,回答问题:

PTC是一种新型的半导体陶瓷材料,它以钛酸钡为主,渗入多种物质后加工而成,目前家用的陶瓷暖风器、陶瓷电热水壶等就是用这种材料做成的。PTC有一个根据需要设定的温度,低于这个温度时,其电阻随温度的升高而减小,高于这个温度时,电阻值则随温度的升高而增大,我们把这个设定的温度叫“居里点温度”,用PTC材料制成的电热器具有发热、控温双重功能,应用十分广泛。

①家用固体电热灭蚊器就使用PTC陶瓷电热元件,如图为其电阻随温度变化的图像,由图可知,该PTC材料的“居里点温度”为     ℃。

②家用固体电热灭蚊器工作时的温度基本恒定在165℃左右,若它的温度高于165℃,电阻    ,功率    ,使其温度    (均选填“增大”、“不变”或“减小”)。反之,也能自动调节。因此用PTC材料制成的电热器具有自动调节功能。

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题型: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.

9()

A. on the whole

B. in turn

C. on the other hand

D. on the contrary

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