GWD题目求助[不知道题号]

albertchan

Five years ago, as partof a plan to encourage citizens of Levaska to increase the amount of money theyput into savings,Levaska's government introduced special savings accounts in which up to $3,000a year can be saved with no tax due on the interest unless money is withdrawnbefore the account holder reaches the age of sixty-five. (P)  Millionsof dollars have accumulated in the special accounts, so the government's planis obviously working. (C)

Which of the following,if true, most seriously weakens theargument?（正确答案如何weaken？）

A substantial number of Levaskans have  withdrawn at least some of the money they  had invested in the special accounts.

     

     

Workers in Levaska who already save money in long-term  tax-free accounts that are offered through their workplace cannot take  advantage of the special savings accounts introduced by the government.（我选的）

       

     

The rate at which  interest earned on money deposited in regular savings accounts is taxed  depends on the income bracket of the account holder. live;">(I)

       

     

       

     

Many Levaskans who already had long-term savings have steadily been  transferring those savings into the special accounts.

 

     

       

     

Many of the economists  who now claim that the government's plan has been successful criticized it  when it was introduced.

sdcar2010

Google within this forum.  All your questions have been discussed before.

albertchan

In 1992 outlaw fishing boats began illegally harvesting lobsters from the territorial waters of the country of Belukia. Soon after, the annual tonnage of lobster legally harvested in Belukian waters began declining; in 1996, despite there being no reduction in the level of legal lobster fishing activity, the local catch was 9,000 tons below pre-1992 levels. (P) It is therefore highly likely that the outlaw fishing boats harvested about 9,000 tons of lobster illegally that year. (C)

Which of the following is an assumption on which the argument depends? (HOW)

The illegal lobster harvesting was not so extensive that the population of catchable lobsters in Belukia's territorial waters had sharply declined by 1996.


The average annual lobster catch, in tons, of an outlaw fishing boat has increased steadily since 1992.

Outlaw fishing boats do not, as a group, harvest more lobsters than do licensed lobster-fishing boats.


The annual legal lobster harvest in Belukia in 1996 was not significantly less than 9,000 tons.


A significant proportion of Belukia's operators of licensed lobster-fishing boats went out of business between 1992 and 1996.

albertchan

The Earth's rivers constantly carry dissolved salts into its oceans (P). Clearly, therefore, by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have taken the oceans to reach current salt levels from a hypothetical initial salt-free state(P), the maximum age of the Earth's oceans can be accurately estimated. (C)

Which of the following is an assumption on which the argument depends?(HOW)

The quantities of dissolved salts deposited by rivers in the Earth's oceans have not been unusually large during the past hundred years.        


At any given time, all the Earth's rivers have about the same salt levels.    

There are salts that leach into the Earth's oceans directly from the ocean floor.  

There is no method superior to that based on salt levels for estimating the maximum age of the Earth's oceans.  

None of the salts carried into the Earth's oceans by rivers are used up by biological activity in the oceans.