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【单选题】
一项调查发现,文化程度越高的人收入水平越高,反之收入水平越高的人文化水平也越高,说明文化程度与收入水平之间存在______。A.
正相关关系
B.
负相关关系
C.
因果关系
D.
没有关联
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【简答题】The author believes that television in the United States has become important to most people because ________. A) it promotes family unity B) it helps them develop their speaking ability C) it affects...
【单选题】Over the past fifteen years, the largely urbanized Northeastern United States has shown more and more the influence of the Southwestern portion of the country. Once, very few people in New York City c...
A.
The lifestyle. of people in the Northeast has been enriched by the influence of the Southwestern states.
B.
Most residents of the Southwestern states regularly eat at Tex-Mex restaurants.
C.
Over the last fifteen years, residents of the Southwestern United States have increasingly adopted lifestyles similar to those of the Northeast.
D.
Tex-Mex dishes are an element of the regional cuisine of the Southwestern states.
E.
People in the Northeastern United States eat out more frequently than they did fifteen years ago.
【简答题】投影面垂直线中,侧垂线在投影面上的投影积聚为一点,同时它在投影面和投影面上的投影反映实长。
【简答题】点在一个投影面上的正投影为 ;当直线AB与投影面垂直时,它在投影面上的正投影为 ;当直线AB与投影面平行时,它在投影面上的正投影为 。
【简答题】A Chinese writer Mo Yan has won the 2012 Nobel Prize in Literature, announced the Swedish Academy in Stockholm on Thursday．The win makes Mo Yan the first Chinese citizen to win the Nobel in its Ⅲ-year...
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