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    It is necessary to explain your theory _____, otherwise the????????????? audience won't make sense of what you are trying to get across.

    A. on purpose????????????? B. at length????????????? C. at random????????? D.????????????? on average

     

    【答案】

    B

    【解析】

    试题分析：句意：有必要详细地解释你的理论，否则观众就不会明白你想要表达的意思。A. on purpose故意地；B. at length详细地；C. at random随意；D. on average平均。故选B。

    考点: 考查介词短语的用法。?

     

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    科目：高中英语 来源：2009年高考英语(山东卷) 题型：050

    阅读理解

    　　“In only six days I lost seven pounds of weight．”

    　　“Two full inches in the first three days!”

    　　These are the kinds of statenents used in nagazine, newspaper, radio and television ads, promiaing ncw shnpes and new looks to those who buy the medicine or the deuece．The promoters of prodrcts say they can shape the ligs, slin the face, xmooth wrinkles, or in some other way to bemity o?anrability．

    　　Often such products are nothing more than money-making things for their promotera．The re they produce are questionable, and some are dangerous to health．

    　　To umderstared how these produots can be lihtliy promoted to the public, it is nece?Understand somcthing of the laws coveing their regrlation．If the product is a dnig, FDA(Food Drug Administration)can require proof(证明)under the Food, Drug, and Cosmetic Act the safe and effective before before it is put on the market．But if the product is a device, FDA has no aut to repuire premarketing proof of safety or effectieness．If a product alrendy on the marker danger to health, FDA can repuest the producer or distnbutor to remove it from the a voluntarily, or it can take legal action, including scizure(查封)of the product．

    　　One notable case a few years ago involved an electrical device called the Relaxacisor, had been sold for reducing the waistline．The Relaxacisor produced electriecal shocks to the through contact pads．FDA took legal action against the distributor to stop the sale of the dev the grounds that it was dangerous to health and life．

    　　Olwionsly, most of the deveces on the?have never becn the xubject of courf proce(法律诉讼), and new denices appear continrally, Before buying, it is up to the consumer to the safety or effcctiveness of such items．

    (1)

    It can be inferred that ads mentioned in the text are ________．

    [　　]

    A．

    objective

    B．

    costly

    C．

    unreliable

    D．

    illegal

    (2)

    Which of the following is true according to the text?

    [　　]

    A．

    The court is in charge of removing dangerous product．

    B．

    New products are more likely to be questionable．

    C．

    The production of a device must be approved by FDA．

    D．

    The promoters usually just care about profits．

    (3)

    FDA can ask for the proof of safety and effectiveness of a product ________．

    [　　]

    A．

    if it is a drug

    B．

    if it is a device

    C．

    if its consumers make complaints

    D．

    if its distributors challenge FDA’s authority

    (4)

    The Relaxacisor is mentioned as ________．

    [　　]

    A．

    a product which was designed to produce electricity

    B．

    a product whose distributor was involved in a legal case

    C．

    a successful advertisement of a beauty product

    D．

    an example of a quality beauty product

    (5)

    The author intends to ________

    [　　]

    A．

    make consumers aware of the promoters’fslse puomixds

    B．

    show the weakness of the law on product safety

    C．

    give advece on how to keep young and beautiful

    D．

    introduce tbe crganiaatinon of FDA

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