kuaijizu

Travel agents are market intermediaries who make their living by gathering, organizing, and dispensing information about travel-related services that is not readily available to most consumers through new information technologies, such as the internet much of this information can now be made directly available to consumers. Demand for the services of travel agents will be drastically reduced
Which of the following, if true, most seriously weakens the argument?
A.        Travel agents routinely use the internet and other new information technologies as sources for the information they obtain for their customers.
B.        The amount of information available through the internet and other new information technologies is increasing faster than the capabilities of most consumers to process it
C.        Many people use travel-related services, such as airlines and hotels without consulting a travel agent.
D.        The people who currently use the services of travel agents are also those most likely to gain access to new information technologies
E.        The internet and other new information technologies are currently used by a relatively small proportion of the population
答案为B。选项D和选项E错误的原因是它们说的都是currently的情况，而原文结论的will可知该结论讨论的是将来的情况。

kuaijizu

Tanco, a leather manufacturer, uses large quantities of common salt to preserve animal hides.  New environmental regulations have significantly increased the cost of disposing of salt water that results from this use, and, in consequence, Tanco is considering a plan to use potassium chloride in place of common salt.  Research has shown that Tanco could reprocess the by-product of potassium chloride use to yield a crop fertilizer, leaving a relatively small volume of waste for disposal.
In determining the impact on company profits of using potassium chloride in place of common salt, it would be important for Tanco to research all of the following EXCEPT:
A.        What difference, if any, is there between the cost of the common salt needed to preserve a given quantity of animal hides and the cost of the potassium chloride needed to preserve the same quantity of hides?
B.        To what extent is the equipment involved in preserving animal hides using common salt suitable for preserving animal hides using potassium chloride?
C.        What environmental regulations, if any, constrain the disposal of the waste generated in reprocessing the by-product of potassium chloride?
D.        How closely does leather that results when common salt is used to preserve hides resemble that which results when potassium chloride is used?
E.        Are the chemical properties that make potassium chloride an effective means for preserving animal hides the same as those that make common salt an effective means for doing so?
答案选E。E选项很复杂故很可能正确。该选项说的是“potassium chloride和common salt的化学属性是否相同”。

legnawen

many  thanks @