单项选择题

Questions 36-40
Decide which statement is true in each case and write the corresponding letter on your answer sheet.
PV cells
A.could generate half the UK's energy requirements.
B.work better on a south-facing roof in the UK.
C.pay for themselves faster than solar panels.

A.PV
B.could
C.
B.work
D.
C.pay
E.
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单项选择题
A new computer system has been designed to stop ships sinking. The greatest danger 【21】______ a holed vessel is that flooding of its compartments will make the ship unstable enough to capsizE.It is estimated that nearly half the ships 【22】______ during the second world war capsized because of the loss of 【23】______ .Pacer systems of Burlington, Massachusetts, has now 【24】______ a system devised by a 【25】______ US Navy officer, Stephen Drabouski, which effectively thought out alternative strategies for the ship. The 【26】______ is programmed with every possible eventuality of flood damagE.【27】______ the actual damage is keyed into the computer the operator is told by the computer 【28】______ the implications are and what can be done to destabilize the vessel.Trials on the 'American aircraft carrier USS Midway' have 【29】______ that the reaction time to damage can be cut to a fiftieth. An incident was simulated in which the ship was 【30】______ by two missiles causing flooding to 30 compartments. It took 10 minutes 【31】______ receipt of the flood damage information in the damage control center to a full printout of damage effects, 【32】______ countermeasures and an assessment of the result of the countermeasures;In a re-run of the incident 【33】______ the computer program the damage control officer took four and a quarter hours to establish the 【34】______ of the damage and another four hours 【35】______ a decision could be taken on counter measures.【36】______ the system can be used to provide damage control officers with advice, they do not, of course, have to 【37】______ the information. Quite often the' 【38】______ solution' will be unacceptable for operational reasons. When that happens the system can be asked for 【39】______ or the operator can interrogate the computer to find out what would happen 【40】______ the officer's own solution was put into action.【21】A.toB.onC.inD.for
A.B.
C.
D.
【21】
A.to
B.on
C.in
D.for
单项选择题
Hotels were among the earliest facilities that bound the United States together. They werE.both creatures and creators of communities, as well as symptoms of the frenetic quest for community. Even in the first part of the nineteenth century, Americans were private, business and pleasure purposeD.Conventions were the new occasions, and hotels were distinctively American facilities making conventions possiblE.The first national convention of a major party to choose a candidate for President (that of the National Republican party, which met on December 12, 1831, and nominated Henry Clay for President) was held in Baltimore, at a hotel that was then reputed to be the best in the country. The presence of Barnum's City Hotel in Baltimore, a six-story building with two hundred apartments helps explain why many other early national political Conventions were held therE.In the longer run, too. American hotels made other national conventions not only possible but pleasant and convivial. The growing custom of regularly assembling from afar the 'representatives of all kinds of groups—not only for political conventions, but also for commercial, professional, learned, anD.vocational ones—in turn supported the multiplying hotels. By mid-twentieth century, conventions accounted for over third of the yearly room occupancy of all hotels in the nation, about eighteen thousand different conventions were held annually with a total attendance of about ten million persons.Nineteenth-century American hotelkeepers, who were no longer the genial, deferential 'hosts' of the eighteenth-century European inn, became leading citizens. Holding a large stake in the community, they exercised power to make it prosper. As owners or managers of the local 'palace of the public', they were makers and shapers of a principal community attraction. Travelers from abroad were mildly shocked by this high social position.The National Republican party is mentioned in line 8 as an example of a group______.A.from BaltimoreB.of learned peopleC.owning a hotelD.holding a convention
A.B.
C.
The
D.
A.from
E.of
F.owning
G.holding
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