相关试题
Brunel was involved less in railway construction than in other engineering fields.
A.Right
B.Wrong
C.Not mentioned
When I heard the noise in the next room,I couldn't resist having a peep.
A: chance
B: visit
C: try
D: look
He could not tolerate the extremes of heat in the desert.
A: bear
B: hate
C: like
D: criticize
共用题干
The Greatest Mystery of Whales
The whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.
Immense strength is______(52)into the great body of the big whales,and in fact most of a wha'e'sbo衡is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the______ (54)of eight knot（节）.
An angry whale will______(55).A famous example of this was the fate of Whaler Essex,______(56)was sunk off the coast of South America early in the last century.More recently,steel ships
have ___________( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.
The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his ______(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3,200 feet,where the ______(60)is 1 ,400 pounds to a square inch.Doing so he will______(61)underwater as long as one hour.Two special1 skills are involved in this storing up enough______(62)(all whales are air-breathed ) and tolerating the great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that ______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.
65._________
A:mentally
B:artificially
C:manually
D:automatically
共用题干
The Arctic Ice is Thawing
Father Christmas may have to move his"workshop"from the North Pole because global warming is
thawing the ice beneath his feet and his reindeers'feet as well.His"workshop"is in dire straits.The"plat-
form"for the"workshop"is melting,said Stefan Norris of the World Wildlife Fund environmental group's
Arctic Program.
An eight-nation report by 250 scientists published recently predicted the Arctic Ocean could be ice-free
in summer by 2100 because of a build-up of heat-trapping gases in the atmosphere,mainly from burning fossil
fuels in cars or factories.The North Pole is getting more and more uninhabitable to Father Christmas.
__________(46)Young people learn that Father Christmas'"workshop"produces millions of gifts delivered
by him on a flying,reindeer-drawn sleigh.Hollywood movies like"The Polar Express"tried to make viewers
believe that Father Christmas lives at the North Pole._______(47)
The"Fortress of Solitude"is near the North Pole that could be under threat in a warmer world. Alan Boldt,
spokesman of the Danish Ministry of Science,suggested ways to rescue Father Christmas._________(48)
Another alternative,he argued,woald be building some electrical facilities to ensure the ice stays on the North
Pole for him."This should be a subject for the United Nations,"he said."Danmark could build windmills to pro-
vide Father Christmas with power."Denmark says Father Christmas'real home is Greenland,which will help,
Denmark thinks,to strengthen its position in claiming the sovereignty over the Pole.__________(49)
"Doesn't he already speak Danish?"Boldt said frostily when asked if Father Christmas would be forced
to learn Danish if Denmark won international recognition of its claim to the Pole.Last month's Arctic report
said the region is warming twice as fast as the rest of the globe,partly because dark ground or water,once un-
covered,soaks up more heat than ice or snow.Finland has been most favored by Father Christmas and it has
about 500,000 tourists a year to visit its Christmas center in Rovaniemi in Lapland._________(50)
_________(50)
A:However,Nordic nations all reject it by claiming that their countries are his home.
B:Therefore the North Pole is the most attractive place in the world.
C:If Denmark's claim were accepted internationally,it would have the legal right to search for oil and gas at the North Pole.
D:One of them would be building a giant floating ice rink for the workshop if the Pole thaws.
E:Maybe Father Christmas has already moved to Rovaniemi.
F:He may have to move from the North Pole within our children's lifetimes.
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