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【单选题】
In his ______ to further his knowledge of the universe, man has now begun to explore space.A.
attempt
B.
expedition
C.
trial
D.
chase
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【简答题】The more I look 1 me, the more self-employment seems to be the way to go for many people. I’m not sure if this is just my 2 or it's indeed a global phenomenon, so I'd like to discuss it with you. In m...
【简答题】社会调查研究的基本理论是指社会调查研究的（）和有关社会调查研究对象、目的、方法的一般概念、一般原理、基本原则和（）等。
【简答题】Scientists today are greater effort to study ocean currents(洋流). Most do it using satellites and other high-tech equipment. However, ocean expert Curtis Ebbesmeyer does it in a special way-by s...
【单选题】按照观察过程的结构性质与控制程度,可以将观察分为( )。
A.
参与观察与非参与观察
B.
正式观察与非正式观察
C.
直接观察与间接观察
D.
描述观察、取样观察与评定观察
【单选题】— Why do you look sad? — There are so many problems ________. [ ]
A.
remaining to settle
B.
remained settling
C.
remaining to be settled
D.
remained to be settled
【简答题】社会调查研究应遵循的基本原则是：（）。
【简答题】Text Trouble Cell phone calling plans that allow users to send unlimited text messages are popular with s across the United States. In 2008, an average American sent 2,272 text messages each ...
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