Section BDirections： In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter.OPEC at 50 and the Next 50 YearsA) In its early years in the 1960s, the Organization of the Petroleum Exporting Countries (OPEC) had little price impact. That changed with the Arab-Israeli War of 1973 and an Arab oil embargo (禁运), which oil producers said was in response to the US decision to supply the Israeli military. The group's fame was cemented under the charming leadership of Saudi Oil Minister Sheikh Ahmed Zaki Yamani, who was in office from 1962 until his summary dismissal (立即下台) in 1986. Since then, OPEC's power has swayed. But can it still have influence in the future?B) OPEC sits on around three quarters of the world's reserves, according to sometimes disputed figures from its Annual Bulletin. Its members largely deny international oil companies access, leaving the majors obliged to invest in very expensive oil, such as that beneath the deep water, in tar sands and in the Arctic. "The fact that the world is using up its most expensive crude before it uses up its cheapest oil shows that OPEC is effective," said Lawrence Eagles of JP Morgan.C) A former senior official at Saudi state oil firm Saudi Aramco Sadad al-Husseini argued OPEC was a force for moderation. It has, he said, demonstrated the need for a lower limit to prices to ensure investment in new supplies and to allow the group's biggest producers to invest in idle capacity, which can be released on to the market when necessary. "They are working as the only regulator in the industry today," said Sadad al-Husseini. "They have shown that they are not trying to increase the price in the world."D) OPEC has matured and can become still more important, he argued. "I think the OPEC group has finally proven its very important role in the oil industry. It used to be totally chaotic," he said. "Going forward, OPEC is going to be more critical because reserves in the world are becoming more restricted to OPEC countries and by that we mean the Gulf countries, including Iran."E) After exerting strong influence in the 1970s, OPEC's effectiveness decreased during the Asian crisis of the 80s and again in the late 90s. During the latest recession, OPEC showed great resolution in agreeing a record output cut and then ensuring unprecedented levels of output discipline. That helped to drive the price back up from a low of $32.40 in December 2008 to the roughly $70-$80 price range which is suggested appropriate for producers and consumers. "The limits of its influence tend to get highlighted during recession. It took them 18 years to revive prices after the 1986 price collapse, but just a few months during the 2009 recession," said Eagles.F) Al-Husseini argued alternative energy was a necessary complement to fossil fuels. "It's not that alternatives are a problem; alternatives are a necessary solution to supply weakness," he said. For Eagles, OPEC's power will endure for as long as cars run on oil products. "The one thing that would simply destroy OPEC would be the widespread electronic vehicles," he said. "OPEC has influence because oil demand is inelastic (刚性的)."G) OPEC members prefer to consider themselves a producer group, which happens to control more than one third of the world's daily oil output. Many economists say OPEC is a cartel in which the group restricts supply in order to influence the price. They also say it faces the classic cartel problem of difficulties in persuading its members to comply with agreed curbs and only steep price slides succeed in enforcing discipline.H) Where it differs from many cartels is that it has one producer—Saudi Arabia—that is much larger than the others, enabling it alone to add or subtract supply depending on the state of the oil market and the oil price. From the early 1970s to the mid 1980s, OPEC set crude prices. More recently, it has often steered clear of specific price discussion. On its website, OPEC says member nations voluntarily restrain their crude oil production to stabilize the oil market and avoid severe price change, which it says is very different from price setting.I) Conflict of interests can influence the consensus within the group and reduce levels of obedience with agreed limitations. Saudi Arabia tends to be a US ally and a price moderate. US enemy Iran has large populations, large spending plans and relies heavily on oil exports for funding. They tend to favor higher prices, but to leave the work of obedience to other members of the group as they maximize their own output to try to maximize revenue in the immediate term. Iraq has long been excluded from output targets because of the damage to its social facilities of years of conflict. Output targets are calculated partly on the basis of oil reserves. Iraq has slightly smaller oil reserves than neighbor Iran, which has a production limit of 3.34 million b/d, so Iraq's target might be similar. However, Iraq has signed contracts with foreign companies to increase its production capacity to 12 million b/d in six-to-seven years' time. That would place the country a close second to Saudi Arabia, which has an output capacity of 12.5 million b/d.J) Iraq's drive to expand will need to be balanced against the production of other OPEC members and the group may have to deal with the dissatisfaction of some member countries, such as Angola and Nigeria. Angola, which has also experienced years of civil war, has repeatedly asked to be excluded from output targets and has produced well above its implied ceiling. Apart from the need for revenue for itself, Angola, together with Nigeria, has partnerships with foreign operators that want to maximize output to ensure swift returns and dislike OPEC production curbs. Nigeria is also hoping for an adjustment to its output limit, which it has said was set when militant attacks on oil facilities in Niger reduced its production capacity. All these differences can probably be contained for as long as prices remain in a range broadly acceptable for all members of OPEC, even if they are more acceptable for some than others.11. Although we need alternatives, oil demand is still inelastic as long as cars run on oil products.12. Both Iran and Iraq tend to favor higher prices.13. OPEC was very effective in controlling the oil price during the late 90s.14. OPEC is trying to control the oil price in the world.15. OPEC is an organization which was in a strong position when Ahmed Zaki Yamani was in charge.16. OPEC will be playing a more important role in the world oil industry.17. OPEC is different from other cartels.18. It is not an easy thing that all the OPEC members agree on the acceptable oil price.19. OPEC members invest big in very expensive oil.20. OPEC is somewhat like a cartel because it also faces the classic cartel problem.

传感器一般有哪三种电路组成？

A. 敏感元件、转换元件、转换电路
B. 光敏元件、转换元件、敏感电路
C. 敏感元件、转换电路、震动电路
D. 敏感电路、转换元件、转换器

传感器可以按照哪些方式分类？

A. 按用途分类
B. 按输出信号分类
C. 按原理分类
D. 按型号分类

IEEE 802.16有以下哪三个体系结构？

A. 物理层
B. 数据链路层
C. 汇聚层
D. 应用层

云计算具有以下特点（）。

A. 虚拟化
B. 按需服务
C. 高扩展性
D. 廉价性

大数据来自互联网数据、行业/企业数据及。

物联网：把所有物品通过等信息传感设备与Internet连接起来，从而实现智能化的识别和管理。

数据在云端，不怕丢失、不必备份，可以任意点恢复。

A. 对
B. 错

我们每一个人都是大数据的贡献者！

A. 对
B. 错

PowerPoint文档不可以保存为纯文本文件。

A. 对
B. 错