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【单选题】
热机包括内燃机,柴油机和汽油机都属于内燃机,关于热机的下列说法中正确的是()A.
汽油机顶部有喷油嘴,柴油机顶部有火花塞
B.
柴油机在吸气冲程中将柴油和空气的混合气吸入气缸
C.
四冲程汽油机在工作过程中,进、排气门同时关闭的冲程是做功冲程和压缩冲程
D.
在柴油机的压缩冲程中,机械能转化为柴油和空气混合物的内能
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举一反三
【单选题】In terms of communication in another language, marketers should not be too ______.
A.
proud
B.
modest
C.
self-confident
D.
happy
【单选题】The internet truly flattens the world—a fact that brings opportunities to marketers with international ______ to their businesses or desires to do business globally.
A.
components
B.
complication
C.
computer
D.
compliment
【单选题】what is the effect of data on marketers in smart city?
A.
Help building several scenarioes.
B.
Make marketing less efficient.
C.
Build closer relationship between the marketers and consumers.
D.
Lead to targeted marketing
【简答题】A．customers B．addicts C．participants D．marketers
【简答题】__________ [A]customers [B] addicts [C] participants [D] marketers
【简答题】Not all marketers pay attention to the marketing principle.
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