GMAT考试资料：GWD试题合集（三十九）.

　　以下将为正在备战GMAT考试的同学们整理一些经典的GMAT阅读试题，并分多个合集推出，希望能够为正在备考GMAT考试的考生提供或多或少的帮助。

　　22. T-4-Q24~27:天山-7-33～36另类海豹哺乳方式与众不同

　　Until recently, zoologists believed that

　　all species of phocids (true seals), a pin-

　　nipped family, use a different maternal

　　Line strategy than do otariids (fur seals and

　　(5) sea lions), another pinniped family. Mother

　　otariids use a foraging strategy. They

　　acquire moderate energy stores in the

　　form of blubber bore arriving at breeding

　　sites and then fast for 5 to 11 days after

　　(10) birth. Throughout the rest of the lactation

　　(milk production) period, which lasts from

　　4 months to 3 years depending on the

　　species, mother otariids alternately for-

　　age at sea, where they replenish their fat

　　(15) stores, and nurse their young at breed-

　　ing sites. Zoologists had assumed that

　　females of all phocids species, by contrast,

　　use a fasting strategy in which mother

　　phocids, having accumulated large energy

　　(20) stores bore they arrive at breeding sites,

　　fast throughout the entire lactation period,

　　which lasts from 4 to 50 days depending on

　　the species. However, recent studies on

　　harbor seals, a phocids species, found that

　　(25) lactating females commenced foraging

　　approximately 6 days after giving birth and

　　on average made 7 foraging trips during

　　the remainder of their 24-day lactation

　　period.

　　(30) The maternal strategy evolved by

　　harbor seals may have to do with their

　　small size and the large proportion of their

　　fat stores depleted in lactation. Harbor

　　seals are small compared with other phocids

　　(35) species such as grey seals, all of which

　　are known to fast for the entire lactation

　　period. Studies show that mother seals of

　　these species use respectively 84 percent,

　　58 percent, and 33 percent of their fat

　　(40) stores during lactation. By comparison,

　　harbor seals use 80 percent of their fat

　　stores in just the first 19 days of lactation,

　　even though they occasionally feed during

　　this period. Since such a large proportion

　　(45) of their fat stores is exhausted despite

　　feeding, mother harbor seals clearly cannot

　　support all of lactation using only energy

　　stored bore giving birth. Though smaller

　　than many other phocids, harbor seals are

　　(50) similar in size to most otariids. In addition,

　　there is already some evidence suggesting

　　that the ringed seal, a phocids species that

　　is similar in size to the harbor seal, may

　　also use a maternal foraging strategy.

　　文章两处用到了对比：phocids和otariids;harbor seals和other phocids

　　以上就是本期GMAT试题的所有内容，考生可以此为据并进行针对性的练习，逐步掌握GMAT阅读的解题规律及技巧，以达到迅速提高GMAT考试成绩的目的。 相关链接：

1.GMAT考试资料：GWD试题合集（三十八）

2.GMAT考试资料：GWD试题合集（三十七）

3.GMAT考试资料：GWD试题合集（三十六）

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