夏天来临,同学们又可以畅饮汽水了。在购买和贮存玻璃瓶汽水时,要注意如下问题:①不

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问题:

夏天来临,同学们又可以畅饮汽水了。在购买和贮存玻璃瓶汽水时,要注意如下问题:①不要猛力碰撞;②不要在阳光下曝晒;③不要长时间贮藏在冰箱的冷冻室里。请用你所学的化学知识加以解释。

考点:气体溶解度
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安装时,螺栓应朝向一致.

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IV. 阅读理解:(共20题,每小题2分,共40分)
A long time ago, before there was any money (coins or paper money), people got the things that they needed by trading or exchanging. Salt was one of the first items used to exchange for other items. Later, some of the common things that were used for exchanging were tea leaves, shells, feathers, animal teeth, tobacco, and blankets. Around 3000 BC, barley, a type of grain, was used for exchanging.
The world’s first metal money was developed by the Sumerians who melted silver into small bars all weighing the same. This was around 1000 BC. About three hundred years later, people started using coins as official money.
Around 640 BC, people in the ancient kingdom of Lydia ( which was in Turkey) created special coins of exact with and purity (纯度). They were made of gold and silver and were stamped with a lion’s head.
Later, other empires such as Greece, Persia, and Rome adopted the concept of coins and started developing their own in many different shapes and different metals.
Around the year 1000, the Chinese started using paper money. The Chinese were the first to use paper money. The Europeans discovered this thanks to Marco Polo who went to China in 1295. the Chinese had different values for the paper notes which were made by the Chinese government.
Around 1661, Sweden became the first European country to make paper money. Until 1850, the Spanish dollar was the coin most widely used throughout the world.
1What is the best title for this passage?
A.
The history of money
B.
How people traded in the past
C.
The invention of paper money
D.
The use of coins around the world
2We learn that before coins and paper money were used, _____.
A.
barley had always been used for exchanging
B.
only a few people knew how to trade with others
C.
salt was the most widely used item for exchanging
D.
many kinds of things were used for exchanging
3According to the passage, when did people start using coins as official money?
A.
Around 1300 BC.
B.
Around 1000 BC.
C.
Around 700 BC.
D.
Around 640 BC.
4The underlined word “adopted” in Paragraph 4 probably means “____”.
A.
replaced
B.
changed
C.
accepted
D.
invented
5. Which of the following countries first started to use paper money?
A. Spain     B. China      C. Sweden      D. Lydia
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筑施工中,按照施工开挖的难易程度将岩土分为()类。

A.6

B.7

C.8

D.9

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男,42岁,码头搬运工,腰部疼痛2年,常于冬、春季加重,休息及服吲哚美辛后缓解,最近腰痛加剧,不能弯腰,体查脊柱无畸形,无压痛,弯腰45°时左下肢感牵扯痛,腰椎照片椎体正常。该患者腰痛原因可能为()

A.腰肌纤维组织炎

B.椎间盘突出

C.腰椎早期结核

D.腰椎陈旧性骨折

E.韧带扭伤

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由于公司资本结构不同而影响公司支付本息的能力所产生的风险,称为()。

A、系统风险

B、非系统风险

C、投资风险

D、融资风险

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