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【简答题】
在建立计量经济学模型中，进行统计检验的目的在于检验模型的计量经济学性质。( )
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皮皮学刷刷变学霸
举一反三
【单选题】According to the last paragraph , development of education
A.
results directly from competitive environments.
B.
does not depend on economic performance.
C.
follows improved productivity.
D.
cannot afford political changes.
【单选题】According to the writer, the Government's policy on physical education
A.
should not promote team games at all
B.
upholds the principles of the Olympic Games
C.
can produce successful Marathon participants
D.
should encourage those qualities pursued by Marathon participants
【单选题】绘制中纵剖面图时,位于中线面和舷侧之间的构件一般在图中用()画法表示,即用细双点划线表示这些构件可见轮廓的投影,用细虚线表示构件这些构件不可见轮廓的投影。
A.
投影
B.
假想
C.
重叠
D.
剖切
【简答题】电气图样中的粗实线、细实线、虚线、点划线、双点划线各表示什么意思？
【单选题】It is suggested in the fourth paragraph that comprehensive sex education
A.
does not put off sexual activity among the teens.
B.
helps the teens reduce the risk of becoming pregnant by 50%.
C.
helps 50% of the teens avoid the sexual behavior.
D.
helps the teens avoid becoming pregnant more effectively.
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