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【单选题】
结构 的烷烃,其系统命名为( )A.
2-甲基-2-丁烷
B.
3-甲基-3-己烷
C.
2，2-二乙基戊烷
D.
3，3-二甲基戊烷
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举一反三
【单选题】Though high-priced, specialty goods still have customers because ________.
A.
consumers can afford specialty goods
B.
consumers buy them not just for their physical quality but also for recognition, status and so on
C.
consumers think that specialty goods are profitable
D.
consumers think that specialty goods last longer
【单选题】Compared with convenience goods, which of the following is NOT true of specialty goods?
A.
Specialty goods are designed only for the rich
B.
Specialty goods are usually bought at a higher price
C.
Specialty good are usually bought less often
D.
Specialty goods are often bought after comparison with competing brands.
【简答题】Her specialty is heart surgery.
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