Patrons at a certain restaurant can select two of three appetizers—fruit, soup, and salad—
A.1/2
B.1/3
C.1/6
D.1/9
E.1/12
A.1/2
B.1/3
C.1/6
D.1/9
E.1/12
There is a great variety of observational studies. A researcher stands near the entrance【C8】______ a theatre and observes the approximate age and sex of patrons【C9】______ the theatre during certain times of the day and days of the【C10】______. Researchers comb through the garbage【C11】______ of Arizona residents to【C12】______ what is being thrown【C13】______ and, by inference from packages,【C14】______ is being bought. Toy manufacturers watch【C15】______ behind one-way mirrors to see how children【C16】______ to and play【C17】______ prototypes(样品) of toys they are thinking of introducing. Observers in public places -- airports,【C18】______ offices -- watch to see【C19】______ subjects read newspapers and magazines. Researchers call【C20】______ households and take a "pantry audit" to learn the quantity and brands of certain items on the kitchen or bathroom shelves.
【C1】
A.notice
B.see
C.discover
D.watch
A.line
B.control
C.order
D.date
A、salesmen
B、the general manager
C、VIP patrons
D、telephone operators
In the last paragraph, the word "patrons" probably means______.
A.professional people
B.academic researchers
C.librarians
D.readers
A.patrons
B.clients
C.supporters
D.customers
A.kind
B.kindly
C.kindlier
D.kinder
A.Leaving materials in the Central Library's outside depositories
B.Renewing materials through the Central Library's website
C.Calling a branch library on December 25th
D.Mailing the materials to the Central Library
A、his patrons
B、Queen Victoria
C、landless peasants
D、Coleridge
In paragraph 5, why does the author mention religious and academic institutions?
A.To show how effective Internet blocking software can be.
B.To illustrate that filters may fail to block harmful sites.
C.To explain what types of research sites library patrons use.
D.To show that the blocking software may target the wrong sites.
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