[螺极] 时而约意螺极寂静整理（共186只，最后更新：12/25 -19:15）

怡然yiran

34. GWD17-Q34:

During the month of May, crabs arrive on Delaware
’s beaches to lay eggs.Certain shorebirds depend on these eggs for food during their annual spring migration to their northern breeding grounds.Delaware’s crab population has declined recently.This decline, however, poses no serious threat to the migrating shorebird populations:by remaining longer in Delaware, the birds will be able to eat enough crab eggs to allow them to complete their migration.
Which of the following, if true, most seriously weakens the argument?



A.No other food available to the birds on Delaware
’s beaches is as nutritious and accessible as are crab eggs.
B.The decline in the number of crabs on Delaware
’s beaches is due to the harvesting of crabs by humans.
C.There are more crabs on Delaware
’s beaches than in any other area that the migrating birds pass through.
D.The crabs do not conceal their eggs.

E.The earlier in the season the shorebirds complete their migration, the more likely they are to breed successfully.

-- by 会员 多事之猫 (2011/12/8 21:03:47)

同时啊，真默契

may24

JJ 32题是OG原题 og12- cr62

When there is less rainfall than normal, the water level
of Australian rivers falls and the rivers fl ow more
slowly. Because algae whose habitat is river water
grow best in slow-moving water, the amount of algae
per unit of water generally increases when there has
been little rain. By contrast, however, following a
period of extreme drought, algae levels are low even
in very slow-moving river water.

Which of the following, if true, does most to explain
the contrast described above?

(A) During periods of extreme drought, the
populations of some of the species that feed on
algae tend to fall.

(B) The more slowly water moves, the more
conducive its temperature is to the growth
of algae.

(C) When algae populations reach very high levels,
conditions within the river can become toxic for
some of the other species that normally live
there.

(D) Australian rivers dry up completely for short
intervals in periods of extreme drought.

(E) Except during periods of extreme drought, algae
levels tend to be higher in rivers in which the
fl ow has been controlled by damming than in
rivers that fl ow freely.

Daisy1989421

逻辑狗太少了。。上月有100多呢。。

meganpeng

马上要考试了，弱弱地问一句，什么叫做考古啊？

犇小康

怎么找不到福建？

yinbv

逻辑第一题，好像A更合理：
After the national speed limit of 55 miles per hour was imposed in 1974, the number of deaths per mile driven on a highway fell abruptly as a result. Since then, however, the average speed of vehicles on highways has risen, but the number of deaths per mile driven on a highway has continued to fall.
Which of the following conclusions can be properly drawn from the statements above?
(A)The speed limit alone is probably not responsible for the continued reduction in highway deaths in the years after 1974.
(B)People have been driving less since 1974
(C)Driver-education courses have been more effective since 1974 in teaching drivers to drive safely
(D)In recent years highway patrols have been less effective in catching drivers who speed.
(E)The change in the speed limit cannot be responsible for the abrupt decline in highway deaths in 1974.

misscheese

THX!!!!!!!!

犇小康

辛苦，真挚感谢

nacyrio

神人啊

苹果大叔

非常感谢！