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【多选题】
调查研究的设计主要有三种类型:横断设计、连续独立样本设计和纵向设计。以下属于纵向设计特点的是( )。A.
使研究者可以描述总体的特征或者描述两个或多个总体建的差异。
B.
要求研究者对总体的不同样本在一个时间段内完成调查。
C.
使研究者可以考查总体随时间的变化。
D.
使研究者可以考查个体随着时间变化的情况。
E.
最大的缺陷是样本流失问题。
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举一反三
【简答题】Which sentence in paragraph 3 tell us that: there are currently too many LCD screens on sale?
【单选题】患者，男性，58岁，因右下肢剧烈疼痛、麻木、发凉、苍白6h就诊．既往有多年房颤病史。最可能的诊断是
A.
血管闭塞性脉管炎
B.
动脉硬化性闭塞症
C.
动脉栓塞
D.
雷诺现象
E.
深静脉血栓形成
【单选题】The author tells the story of the explorers Lewis and Clark in paragraph 3 in order to illustrate which of the following points?
A.
The number of deer within the Puget Sound region has varied over time.
B.
Most of the explorers who came to the Puget Sound area were primarily interested in hunting game.
C.
There was more game for hunting in the East of the United States than in the West.
D.
Individual explorers were not as successful at locating game as were the trading companies.
【简答题】根据下列选项，回答 41～45 题。 “Free Carrier”means that the 1 delivers the goods，cleared for export，to the carrier nominated by the 2 at the named place．It should be noted that the chosen place of 3 has an impact...
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【单选题】男性，58岁，因右下肢剧烈疼痛、麻木、发凉、苍白6小时就诊。既往有多年房颤病史。最可能的诊断是
A.
血管闭塞性脉管炎
B.
动脉硬化性闭塞症
C.
动脉栓塞
D.
雷诺病
E.
深静脉血栓形成
【简答题】In paragraph 3, there is some words which serve as a pivotal point (关键转折) , what are they?
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