12.1 广州遛狗狗……

windie

数学 n=47?
        体积是 3125/pai
        余数=1？

-- by 会员 yinxiaolin (2011/12/1 17:33:39)

n=12

cathystop923

谢谢楼主了！

scofieldcheng

多谢楼主

manutdryangigg

我才做过不久，貌似是14，或15套里面的

irisgogogo

是不是两种海豹，一种哺乳期长，一种短，哪一题啊？？？？？

NBibi

数学 n=47?
        体积是 3125/pai
        余数=1？

-- by 会员 yinxiaolin (2011/12/1 17:33:39)

n=12

-- by 会员 windie (2011/12/1 17:36:38)

n应该=12吧？……内个体积是多少多少pai的形式，最接近的好像是225pai 吧……貌似是

vitapan

月读：GWD原题来着，那啥两种动物在哺乳期间用多少力气多少时间找食物来着，不知道是啥动物……
求原文，哪套啊

XYXB

LZ，GWD那篇原题可否给1-2个关键字，谢谢，不知道是不是这篇：

T-4-Q24~27: TS-7-33～36

Untilrecently, zoologists believed that all species of phocids (true seals), apin-nipped family, use a different maternal strategy than do otariids (furseals and  sea lions), another pinnipedfamily. Mother otariids use a foraging strategy. They acquire moderate energystores in the form of blubber before arriving at breeding sites and then fastfor 5 to 11 days after birth. Throughout the rest of the lactation (milkproduction) period, which lasts from 4 months to 3 years depending on the species,mother otariids alternately forage at sea, where they replenish their fat stores,and nurse their young at breeding sites. Zoologists had assumed that females ofall phocids species, by contrast, use a fasting strategy in which mother phocids,having accumulated large energy stores before they arrive at breeding sites, fastthroughout the entire lactation period, which lasts from 4 to 50 days dependingon the species. However, recent studies on harbor seals, a phocids species,found that lactating females commenced foraging approximately 6 days aftergiving birth and on average made 7 foraging trips during the remainder of their24-day lactation period.
Thematernal strategy evolved by harbor seals may have to do with their small sizeand the large proportion of their fat stores depleted in lactation. Harbor sealsare small compared with other phocids species such as grey seals, all of which areknown to fast for the entire lactation period. Studies show that mother sealsof these species use respectively 84 percent, 58 percent, and 33 percent oftheir fat stores during lactation. By comparison, harbor seals use 80 percentof their fat stores in just the first 19 days of lactation, even though theyoccasionally feed during this period. Since such a large proportion of theirfat stores is exhausted despite feeding, mother harbor seals clearly cannot supportall of lactation using only energy stored before giving birth. Though smaller thanmany other phocids, harbor seals are similar in size to most otariids. Inaddition, there is already some evidence suggesting that the ringed seal, aphocids species that is similar in size to the harbor seal, may also use amaternal foraging strategy.


T-4-24:T-733It can beinferred from the passage that the females of all phocids species differ fromthe 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 theirlactation periods
E.    deplete a smaller percentage of their fatstores during their lactation periods

T-4-25:T-7-34Theprimary purpose of the passage is to
A.   present evidence that several phocidsspecies use the maternal fasting strategy
B.   explain why the maternal strategy typicallyused by phocids is different from the maternal strategy used by otariids
C.   argue that zoologists’ current understandingof harbor seals’ maternal strategy is incorrect
D.   describe an unexpected behavior observed inharbor seals and propose an explanation that may account for the behavior
E.    describe evidence concerning the maternalstrategy of the harbor seal and suggest that the harbor seal belongs to theotariid rather than to the phocids family

T-4-26:T-7-35Accordingto the passage, until recently zoologists believed which of the following aboutall phocids mothers?
A.   Their fasting periods after giving birthwere typically shorter than those of otariids.
B.   Their lactation periods were generally aslong as those of comparably sized otariids.
C.   They acquired only moderate energy stores inthe form of blubber before arriving at breeding sites.
D.   They depleted less than a third of theirstored body fat during lactation.
E.    The replenished their fat stores only aftertheir lactation period ended.

T-4-27-T-7-36The authorof the passage mentions ringed seals most probably in order to
A.    provide anexample of a phocid species that fasts throughout its entire lactation period
B.   provide an example of a phocid species whosematernal strategy is typical of phocid species
C.   provide an example of a phocid species thatmay deplete an even higher proportion of its fat stores during lactation thanharbor seals do
D.   support the assertion that harbor seals aresmaller than many other phocids
E.    support the assertion that harbor seals’maternal strategy may be related to their small size

cheesecake959

请问楼主，原题应该是 2^51 和  2^n*3^3有一样多的因子数吧？51+1=（n+1)*(3+1）


谢谢！

no1taoqiyy

感谢lz分享。。。