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> Ŀ > Zи˼ > پW{ > иӖ > xиx}ͽŒ}

xиx}ͽŒ}
lrg2013-06-06 ߣ ԴڣZWվ

Œ}Factual Information Questionsиÿαؿ}ÿ}^࣬ͨÿƪ3-6

 

@N}ҪRe_UŒϢ@ЩŒϢ}ҪŒxUϢ@N}һҪRijһᵽľwϢƪµּͨrPϢһԒɾԒ

 

@N}Ŀᆖʽͨ飺

According to the passage, which/ what/ why/how/who/where/when.

The authors description of X mentions which of the following?

According to the paragraph, X occurred because

ȵ

 

 

 

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}ĿPI~

PI~жλPϢ

xҵԭČĸČ/ͬxQ

 

ע⣺

Ҫ쿼Ķλ

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}^ҪųЩe`xe`xͨ

 

؏еϢ]лش}

e`_еϢ^c

c^c

cŸoPЛ]бᵽ

 

 

҂ͨ^1Ӂʾ@N}ĿĴ}E

It should be obvious that cetaceans--- whales, porpoises, and dolphins--- are mammals. They breathe through lungs, not through gills, and give birth to live young. Their streamlined bodies, the absence of hind legs and the presence of a fluke and blowhole cannot disguise their affinities with land dwelling mammals. However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses, whose limbs are functional both on land and sea), it is not easy to envision what the first whales looks like. Extinct but already fully marine cetaceans are known from the fossil record. How was the gap between a walking mammal and a swimming whale bridged? Missing until recently were fossils clearly intermediate, or transitional, between land mammals and cetaceans.

 

 

In paragraph 1, what does the author say about the presence of a blowhole in cetaceans?

  It clearly indicates that cetaceans are mammals.

  It cannot conceal the fact that cetaceans are mammals.

  It is the main difference between cetaceans and land-dwelling mammals.

  It cannot yield clues about the origins of cetaceans.

}E҂x}Ŀ_PI~顰a blowhole in cetaceans펧PI~жλPϢ顰the presence of a fluke and blowhole cannot disguise their affinities with land dwelling mammalsȻxxҵԭČăݵĸČ顰It cannot conceal the fact that cetaceans are mammals, _𰸞ڶx

 

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