【每日逻辑练习第二季】【1-2】

manqianchen

1. Beverage company representative: The plastic rings
that hold six-packs of beverage cans together
pose a threat to wild animals, which often
become entangled in the discarded rings and
suffocate as a result. Following our lead, all
beverage companies will soon use only those
rings consisting of a new plastic that
disintegrates after only three days’ exposure to
sunlight. Once we all complete the switchover
from the old to the new plastic rings, therefore,
the threat of suffocation that plastic rings pose
to wild animals will be eliminated.
Which one of the following, if true, most seriously
weakens the representative’s argument?  
--BIBLE WEAKEN NO.2
B: plastic rings pose a threat to wild animals by suffocating them
P1: all beverage companies will soon use new rings that will disintegrates after 3 days' exposure to sunlight
C: once the switchover is copleted, the threat will be elimilated

(A) The switchover to the new plastic rings will
take at least two more years to complete.
irrelavant: the conclustion states that once the switch over is completed

(B) After the beverage companies have switched
over to the new plastic rings, a substantial
number of the old plastic rings will persist
in most aquatic and woodland environments.
C.D.E. irrelavant

2.


Tiger sharks are common in the waters surrounding Tenare Island.  Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches.  This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues.  In order to help the economy, therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.

B:tiger sharks are common around the T Island. Usually they feed on smaller sharks, but sometimes they attached tourists
P:Sharks' attack to tourists will hurt T's tourism industry
C: Mayor propose to kill the tiger sharks within a mile of the beaches in order to help the economy


Which of the following, if true, most strongly calls into question the likelihood that implementation of the mayor's proposal will have the desired consequence?
-- PREP07 CR1 NO.5
AB strengthen
CE irrelavant
D:correct

(A) Even if not all the tiger sharks that come close to the beaches are killed, the existence of the program would reassure tourists.
(B) Business owners who depend on tourism are willing to pay most of the cost of implementing the program.
(C) Tourists come to Tenare Island for its beaches, even though the island features a number of other tourist attractions.
(D) The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.
(E) Not all tourists who come to Tenare Island enjoy swimming or surfing.


3.


The country of Ertland has never imported apples in any significant quantity because consumers there generally prefer the unique texture of Ertland-grown apples.  Nevertheless, apple growers from Kosolia, a neighboring country, plan to sell their apples in Ertland by selling Kosolia-grown apples at half the price of local apples and promoting them as a nourishing, low-cost alternative.
B: E has never imported apples in any sig.quan. because people there prefer local apples
F: Apple grouers from K want to sell their apples in E by selling K appples cheaper apples and promoting them as a nourishing, lost cost alternative


Which of the following, if true, casts most doubt on the viability of the plan by Kosolia's apple growers to sell their apples in Ertland?
-- PREP07 CR1 NO.6
E: correct - it states that K apples cannot be a low cost alternative
BCD - irrelavant
(A) Most of the varieties of apples grown in Ertland were originally derived from common Kosolian varieties.
we need somthing that can undermine "nourishing, low cost alternative"
(E) Profiles of Ertland-grown apples are high enough in Ertland that growers, wholesalers, and retailers there could easily afford to reduce the price at which these apples are sold.


4.


As part of major renovations to Flowertown's Main Street train station, consultants to the train company proposed moving the station's entrance from its current valuable Main Street location to a low-rent adjoining side street and then leasing the high-rent entrance space to retail businesses.  In that way, the train company could easily pay for those and all other proposed renovations without negative impact on its tight budget.
p:move the station's entrance from the high cost location to a low cost one and rent the high cost location to retail businesses
c: train company could easily pay for those and all other renovations without negatively impact on its tight budget

Which of the following, if true, would most strongly support the consultants' proposal?
-- PREP07 CR1 NO.7
B
(A) More train commuters are employed in businesses located on Main Street than in businesses located on the adjoining side street.
(B) A reliable survey of Flowertown's commuters showed that virtually none of them would use the train any less frequently if the station's entrance were moved.
(C) The high-rent block of Flowertown's Main Street includes several buildings whose owners currently seek to replace long-standing tenants lost in recent months.
IRR
(D) If the station's entrance were moved, the train company would need to begin costly renovations to its Main Street entrance space.
D is the opposite answer
(E)IRR


5.


Automobile Dealer's Advertisement:


The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class.  This shows that the PZ 1000 is one of the safest cars available today.
小范围推倒大范围
in its class doesn't indicate one of the safest cars available

Which of the following, if true, most seriously weakens the argument in the advertisement?
-- PREP07 CR1 NO.8
CC
C
(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
(B) In recent years many more PZ 1000s have been sold than have any other kind of car in its class.
(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
(E) The Highway Traffic Safety Institute issues reports only once a year.