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过点P(1，0)作抛物线的切线，该切线与上述抛物线及x轴围成一平面图形．求此平面图形绕x轴旋转一周所成旋转体的体积．
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PART FOUR· Read the article below about the UK cycle industry.· Are sentences 16-22 on the opposite page ’Right’ or ’Wrong’ If there is not enough information to answer ’Right’ or ’Wrong’, choose ’Doesn’t say’.· For each sentence (16-22), mark one letter (A, B or C) on your Answer Sheet. CYCLES MOVE WITH THE TIMES Times have been hard for the UK cycle industry. Poor weather and competition from abroad have had a serious effect on sales. Manufacturers have had to cut back and last month more than 40 job losses were announced at Cycle World, one of the country’s main bicycle factories in Leicester. But the company says it is fighting to win back customers, using such strategies as improved after-sales and bikes built to specific customer requirements. Two years ago, Cycle World sold off its bike-making machinery in an effort to cut costs and save money. The company’s Leicester factory is now only an assembly plant as most of the parts are imported. The company produces half a million bikes a year across the full Cycle World range, with nearly all of these being sold in the UK. Production is largely done by hand. Workers use the batch production method - everyone making up to 600 bikes of a particular model at any one time. At the height of its success, Cycle World employed 7,000 people but, like many areas of manufacturing, it has since shrunk. Its 1950s purpose- built factory now employs just 470 permanent workers, with numbers rising to 700 as temporary staff are taken on to meet seasonal demands in sales. Only a small number of different bike models are produced each month.
· You will hear a radio interview with George Johnson, Managing Director of Media-X, an organisation which invests in internet companies.· For each question (23-30), mark one letter (A, B or C) for the correct answer.· After you have listened once, replay the recording. Approximately how many companies in total does George help each year
· You will hear a radio interview with George Johnson, Managing Director of Media-X, an organisation which invests in internet companies.· For each question (23-30), mark one letter (A, B or C) for the correct answer.· After you have listened once, replay the recording.
ETF的基金合同生效后，基金管理人可以向证券交易所申请上市，上市后要遵循的交易规则有______。
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