产品开始被市场认同，行业开始形成并初具规模，行业内企业少，需要付出代价培育市场，具备以上特点的时期属于产品生命周期中的（）。
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A) voice B) sound C) rhythmD) tone
A. voice
B. sound
C. rhythm
D. tone
This passage is most probably taken from an article entitled “________”.
A. Energy Conservation
B. Houses Building Crisis
C. Air Pollution Indoors
D. Traps in Building Construction
根据下图(图 1)，设计生产能力应为()。
A. Ql B．Q2 C．Q3 D．三点郡一样
The basic features of the communication process are identified in one question: Who
A. how
B. when
C. what
D. such
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