急！！！求解一道GWD逻辑题~提前感谢各位大侠了~

evayan3176

From 1980to 1989, total consumption of fish in the country of Jurania increased by 4.5percent, and total consumption of poultry products there increased by 9.0percent.  During the same period, thepopulation of Jurania increased by 6 percent, in part due to immigration toJurania from other countries in the region.
If thestatements above are true, which of the following must also be true on thebasis of them?
A.   During the 1980’s in Jurania, profits of wholesale distributorsof poultry products increased at a greater rate than did profits of wholesaledistributors of fish.
B.   For people who immigrated to Jurania duringthe 1980’s, fish was lesslikely to be a major part of their diet than was poultry.
C.   In 1989 Juranians consumed twice as muchpoultry as fish.
D.   For a significant proportion of Jurania’spopulation, both fish and poultry products were a regular part of their dietduring the 1980’s.
E.    ！Per capita consumption of fish inJurania was lower in 1989 than in 1980.
为什么选E啊？不明白......
请大侠们给留个详细讲解成嘛？
Thx in advance!

yongsf

因为鱼的消费增长了4.5%，人口增长了6%。所以平均每人消费的鱼的数量减少了，所以E是正确的。而不能通过增长的百分比推出绝对数量，所以其他的选项有问题。

li43119

是楼上说的这样

Grace1211

你看哈，鱼的消费上涨4.5%，poultry上涨9.0%。人涨6%。4.5%/9.0% 小于1吧。所以人均消费鱼下降了。懂？

evayan3176

好的，thx a million!还有一道GWD的题要麻烦你讲解一下啊~
Itis theoretically possible that bacteria developed on Mars early in its historyand that some were carried to Earth by a meteorite.  However, strains of bacteria from differentplanets would probably have substantial differences in protein structure thatwould persist over time, and no two bacterial strains on Earth are differentenough to have arisen on different planets. So, even if bacteria did arrive on Earth from Mars, they must have diedout.

Theargument is most vulnerable to which of the following criticisms?

A.   It fails to establish whetherbacteria actually developed on Mars.
B.   It fails to establish how likelyit is that Martian bacteria were transported to Earth.
C.   It fails to consider whether therewere means other than meteorites by which Martian bacteria could have been carriedto Earth.
D.   It fails to consider whether allbacteria now on Earth could have arisen from transported Martian bacteria.
E.    ! Itfails to consider whether there could have been strains of bacteria thatoriginated on Earth and later died out.
答案是D.求讲解~
谢谢你啦！

evayan3176

嗯 懂啦~谢谢Grace~~~

yongsf

说是细菌很有可能是从mars通过meteorite带到earth的，但是其他星球的细菌在地球上一段时间以后protein　structure会变不一样。由于现在地球上的细菌的protein　structure都是一样的，所以不可能是别的星球（火星）上来得。问削弱。
D提出不能确定地球上现在地球上的细菌是不是也是从火星来的，就是说地球本身是没有这种细菌的。这样的话protein　structure就变得理所应当了。

evayan3176

太感谢了！牛人啊！~~~~~~
以后又不会的题还得求大牛指导啊~~~