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【单选题】
在产品的什么阶段,企业促销的重点是稳住客源,方法是适当减少广告;增强公共关系、营业推广等手段:A.
投入期
B.
成长期
C.
成熟期
D.
衰退期
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皮皮学刷刷变学霸
举一反三
【单选题】I don’t like to disturb you， because you’re quite tired________today.
A.
Of
B.
with
C.
Out
D.
on
【简答题】电涡流式通道安全检查门(简称安检门)通常有1个发射线圈和6个扁平接收线圈,分布在安检门两侧的上、中、下部位,形成______个探测区。发射线圈的激励源频率为几十______赫。当有导电的金______物体通过接收线圈时,改变了每一个接收线圈的感应电动势相位,从而可以在接收线圈中产生电压差。计算机根据感应电压的差值以及与激励源的______差来判定金属物体的大小和所处的位置。
【单选题】You _______ to the meeting today if you have something important to do. [ ]
A.
needn't to come
B.
don't' need come
C.
don't need coming
D.
needn't come
【简答题】In his cluster of poems called Leaves of Grass, ______gave America its first genuine epic poem.
【判断题】Walt Whitman follows only one theme in his Leaves of Grass, that is, the burgeoning life in cities.()
A.
正确
B.
错误
【单选题】Who is the author of Leaves of Grass?
A.
Walt Whitman
B.
Emily Dickinson
C.
Nathaniel Hawthorne
D.
Henry Wadsworth Longfellow
相关题目：
【简答题】In his cluster of poems called Leaves of Grass, ______gave America its first genuine epic poem.