12.1 广州遛狗狗……

怡然yiran

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  动物学家一直相信所有p
    all species of phocids (true seals), a pin-        型海豹的母亲策略和o型
    nipped family, use a different maternal         是不同的。
Line    strategy than do otariids (fur seals and
(5)    sea lions), another pinniped family. Mother     O豹妈妈运用觅食策略。
    otariids use a foraging strategy. They          它们到达饲养地前先以鲸
    acquire moderate energy stores in the          脂形式储存能量，产仔后
    form of blubber before arriving at breeding     禁食5到11天。
    sites and then fast for 5 to 11 days after
(10)    birth. Throughout the rest of the lactation        在后来4个月到3年的
    (milk production) period, which lasts from      泌乳期里，它们都会在海
    4 months to 3 years depending on the          里觅食，重获力量养儿。
    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          动物学家以为P豹运用禁
    females of all phocids species, by contrast,     食策略，即妈妈在4到50
    use a fasting strategy in which mother         天的泌乳期内戒食。
    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         但是近期对H豹-一种P
    harbor seals, a phocids species, found that      类豹的研究发现，泌乳雌
(25)     lactating females commenced foraging        性产仔后约6天开始觅食，
    approximately 6 days after giving birth and     在24天的泌乳期内平均觅
    on average made 7 foraging trips during       食7次。
    the remainder of their 24-day lactation
    period.
(30)        The maternal strategy evolved by      H豹的母亲策略与其体积
    harbor seals may have to do with their         小消耗大是有关的。
    small size and the large proportion of their
    fat stores depleted in lactation. Harbor         H豹与其它P类豹如灰海
    seals are small compared with other phocids    豹相比体型更小，灰海豹
(35)    species such as grey seals, all of which        整个泌乳期就戒食。
    are known to fast for the entire lactation
    period. Studies show that mother seals of        其它P类豹在泌乳期
    these species use respectively 84 percent,       内分别消耗84%,58%和
    58 percent, and 33 percent of their fat          33%的脂肪。
(40)    stores during lactation. By comparison,         相比之下，H豹在泌乳期
    harbor seals use 80 percent of their fat          的前19天就消耗了80%
    stores in just the first 19 days of lactation,       的脂肪。
    even though they occasionally feed during
    this period. Since such a large proportion        所以它们要去觅食。
(45)     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       H豹虽然比其他P豹小，
    than many other phocids, harbor seals are       但与O豹的体型类似。
(50)       similar in size to most otariids. In addition,      另外证据显示体型类似
    there is already some evidence suggesting       H豹的P型环斑海豹也
    that the ringed seal, a phocids species that       使用觅食策略。
    is similar in size to the harbor seal, may
    also use a maternal foraging strategy.

valleylily0815

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

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

+1

davisyang

2^51和2^n*3^4有一样多的正因子，问n?

有大大可以講解一下嗎?

valleylily0815

阅读这篇跟上次25号广州放出来的说法一致啊。

pencillan

2^51这个数的正因子有51+1=52个

2^n*3^3的正因子有（n+1）（3+1）个。。

综合（n+1）（3+1）=52.。

得n=12

NUSTemple

我也觉得啊，不然哪里算的来整数啊

audrey007

阅读捕食是TN-12第三篇阅读吗？楼主确认下～

jili_111

摸摸，没事没事~~我们一起加油！！

bsbloving

2^51和2^n*3^4有一样多的正因子，问n?

有大大可以講解一下嗎?

-- by 会员 davisyang (2011/12/1 18:51:21)

我不是大大,但提醒楼主,应该题目是3^3...否则n不是整数...说不定这是你的困扰吧?

Jane412

谢谢lz~~~