如右图所示,集气瓶内充满某气体,置于明亮处,将滴管内的水挤入集气瓶后,烧杯中的水

题型:选择题

问题:

如右图所示,集气瓶内充满某气体,置于明亮处,将滴管内的水挤入集气瓶后,烧杯中的水会进入集气瓶,集气瓶内气体可能是

①NH3  ②N2、H2  ③NO2、O2 ④SO2   ⑤CH4、Cl2

A.①②③④⑤

B.①②④

C.①③④⑤

D.②③④

考点:化学实验的基本操作化学实验安全危险化学品的标志化学药品的变质
题型:选择题
把分别写有1~20的20张卡片放人纸袋中,任意摸出一张,摸出素数的可能性是(  )
A.
3
5
B.
2
5
C.
1
2
题型:选择题

缓中补虚

题型:选择题

In today’s Internet age, online games can be a change from the pressure of school and work. However, they can also cause problems and unhealthy addictions. This is most clearly seen in the example of South Korea. This country has the world’s highest percentage of high – speed Internet services. It has also a high number of game players who are addicted to online games.

In 2004, a young man died after playing online games almost nonstop for 86 hours. A 12 – year – old boy stole $ 16,000 from his father to continue online games which he could not get away from. Such problems are spreading to other parts of Asia as well. In 2005, it was reported that about 80 percent of China’s 13.8 million online game players were under 25. And many of these were said to be addicted. Such numbers point toward a growing problem among Chinese youth.

Dr. Sue – Huei Chen, a psychologist , discovered some signs of at – risk people. Such people often go online to escape from their problems. And they usually have no friendship or good social skills. They feel the need to spend more and more time online, so they may be absent from school or family. And they become upset if anyone tries to limit their online game playing.

小题1:The passage is mainly about          .

A.online games

B.problems caused by online games

C.computer problems in Asia

D.problems caused by young people小题2:In the passage, the writer tells us a fact that         .

A.South Korea has a large number of Internet schools

B.More and more young men are stealing money for online games

C.China’s online game players are all under the age of 25

D.Online game addiction is a very common problem in South Korea小题3:After reading the passage, we know that in China         .

A.many young people are playing online games for fun

B.many young people are getting addicted to online games

C.only those under 25 like to play online games for long periods

D.80 percent of the Chinese depend on online games to get relaxed小题4:According to the passage,      are more likely to become addicted to online games.

A.people under great pressure from school and work.

B.people well known in the field of computer games

C.people with unsolved problems and few friends

D.people who’d like to take a risk in computer games

题型:选择题

下图为北宋时期“济南刘家功夫针铺”的商标图。最上边文字为“济南刘家功夫针铺”,中间捣药白兔两边的文字为“认门前白兔儿为记”。下部的文字为“收买上等钢条,造功夫细针,不误宅院使用;各转兴贩,别有加饶。请记白。”对此理解正确的是()

①针铺融原料收购、细针制作、销售于一体

②刘家针铺是私营的制针作坊

③反映了两宋时期中国手工业生产、销售的新发展

④北宋手工业产品出现产品商标,有了产品广告

⑤北宋针铺制作规模大、分工细,使用雇工生产

A.①③④⑤

B.①②③④

C.①②④⑤

D.①②③⑤

题型:选择题

男,36岁,平素体健,淋雨后发热,咳嗽2天,右上腹痛伴气急、恶心1天。

首选的治疗药物是()

A.解热镇痛药

B.庆大霉素

C.青霉素

D.头孢他啶

E.胃肠道解痉剂

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