57、According to the author，which is NOT the designer's chief concern when he deslgns a product?
A.Stress factors.
B.Man-hours.
C.Machine tolerances.
D.Customer-appeal.
58、It is stated in the passage that those responsible for giving a product customer-appeal are__________.
A.customers
B.designers
C.advertiseYs
D.manufacturers
59、According to t.he author，when some change in a product is necessary，a manufacturer will choose to__________ .
A.10wer the production cost
B.hire a better designer
C.improve its.Quality
D.alter its image
60、The best title for the passage might be__________.
A.Advertising Since the War
B.Advertising and Manufacturers
C.Advertising and Purchasers
D.Advertising：England’s Biggest Industry
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