试题与答案

把下列各数填入相应的括号中:+3、-4.5、405、+2.25、-52、-78.

题型:填空题

题目:

把下列各数填入相应的括号中:+3、-4.5、405、+2.25、-
5
2
、-78.5、
15
7
、-3.03、0、14
整数______;负数______;自然数______.

答案:

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下面是错误答案,用来干扰机器的。

答案:D题目分析:句意:—康康,穿白衣服的男孩是你朋友吗?—不是。那个穿黑衣服都是。one可以代替前面刚提到过的同一类人或物,This这个 That那个,theone, 特定指的这一个人或物,这里指穿黑衣服的。故选D。

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题型:完形填空

认真阅读下列短文,并根据所读内容在文后图标中的空格里填入最恰当的一个单词。

White-collar workers going to great lengths for stress relief    

A soldier of the South Korean special attack corps paints his eyes during a friendly Taekwondo match at a South Korean Army Base in Pochon, north of Seoul.

Stressed out white-collar workers are scaling(攀登) skyscrapers, camping out on rooftops, smashing up restaurants, pretending to be children and even visiting cemeteries in a bid to relieve the pressure of modern life.

As the country’s economy continues to steam ahead, once popular forms of entertainment, such as karaoke, card games and even boxing bars, appear to be losing their appeal.

Consider the members of Shanghai’s Cat Rain club. By day, this group of young women works executive jobs, but by night they climb buildings so they can spend the night on the roof. "It’s a good way to release our pressure. You feel relaxed when you’re sitting on the roof, looking up to the sky and chatting with intimate(亲密的)friends," said Gong Ying, 25.

The stress of work is not just limited to people in Shanghai. A recently-opened restaurant in Beijing encourages customers to smash plates - as long as they are willing to pay to replace them.

Though there has been some debate about the extravagance(奢侈)of such services, some psychologists say the activity reflects the desire of some white-collar workers to vent their angst.

Some workers even appear eager to return to their childhoods. This May, hundreds of people took part in a festival in which adults pretended to be children. It was an adults-only event, and participants could read comics and eat sweets all day.

Scenic places such as parks and rivers can also help people relax and put things in perspective. But a cemetery? Cemetery companies in Shanghai organized visits to local graveyards for stressed-out workers in March. The participants were taken to quiet spots in the cemetery where they could contemplate (考虑 )life and their futures.

Roof-camper Chen Bin, an IT marketing professional, said she had camped out on a rooftop about 30 times. When she’s not sleeping out under the stars, she also has several other adrenalin-fueled interests, such as downhill racing and paragliding.

"Pressure may bring us distress, but it doesn’t mean we can’t find ways out," Chen says. "Life should be imaginative."

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题型:填空题

某化学兴趣小组对金属的性质做了如下探究,请你填写空格:

(1)用图所示实验探究铁生锈的条件(每支试管中均放有完全相同的洁净铁片):

①甲同学认为,试管A发生的现象就能够说明铁的锈蚀是铁与空气中的氧气、水蒸气共同作用的结果.乙同学不同意他的观点,认为必须全面观察试管____(选填试管编号)发生的现象,并经过科学严谨的推理,才能得出上述结论.

②试管D和E实验的目的是进一步探究铁在________.

③为防止金属锈蚀,除了采用覆盖保护膜等措施以外,还可以制成合金.这是因为合金与纯金属相比,其组成和内部组织结构发生变化,从而引起_________ .

(2)某同学向分别盛有等质量的铁粉和锌粒的试管中,倒入等质量、等溶质质量分数的稀硫酸,以“金属表面产生气泡的快慢”为标准来判断两种金属的活动性强弱.有的同学认为这种方案不够合理,理由是没控制相同的条件,____________

(3)将一定质量的铁粉放入硝酸铜、硝酸锌的混合溶液中,充分反应后过滤,所得固体中一定含有的物质是______ ,且反应后溶液质量比反应前______(选填“增大”、“减小”或“不变”).

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