GWD6-Q33-36

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Q33 to Q36:

Until recently, zoologists believed that

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

niped family, use a different maternal

Linestrategy 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 before 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 phocid species, by contrast,

use a fasting strategy in which mother

phocids, having accumulated large energy

(20)stores before 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 phocid 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 phocid

(35)species such as grey seals, northern ele-

phant seals, and hooded 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,

(40)58 percent, and 33 percent of their fat

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

(45)this period.Since such a large proportion

of their fat stores is exhausted despite

feeding, mother harbor seals clearly cannot

support all of lactation using only energy

stored before giving birth.Though smaller

(50)than many other phocids, harbor seals are

similar in size to most otariids.In addition,

there is already some evidence suggesting

that the ringed seal, a phocid species that

is similar in size to the harbor seal, may



also use a maternal foraging strategy.

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Q33:

It can be inferred from the passage that the females of all phocid species differ from the females of all otariid species in that the female phocids



A.have shorter lactation periods

B.consume more food during lactation

C.consume a higher proportion of fat stores

D.forage for food occasionally during their lactation periods

E.deplete a smaller percentage of their fat stores during their lactation periods

Answer:
我选了E答案A，现在知道A对文章写出了具体的时间，但是想问问E错是因为题里问的是所有的P吗？因为P里面发现那个HS是与其他P物种动物不一样，而与那个O相似，所以相比所有的时候，不对。
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Q34:

The primary purpose of the passage is to



A.present evidence that several phocid species use the maternal fasting strategy错选了这个傻选项。这里写的是原文是maternal foraging strategy....呃。。。不管前面present evidence能不能概括全文了，就这里就可以排除了。。。。

B.explain why the maternal strategy typically used by phocids is different from the maternal strategy used by otariids介绍不同是为了说明新的发现，而不是单单介绍不同。。。。呃。。。。

C.argue that zoologists’ current understanding of harbor seals’ maternal strategy is incorrect

D.describe an unexpected behavior observed in harbor seals and propose an explanation （size和proportion) that may account for that behavior

E.describe evidence concerning the maternal strategy of the harbor seal and suggest that the harbor seal belongs to the otariid rather than to the phocid family

Answer:

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完全崩溃掉这篇文章。。。。。。。