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【单选题】
The Empirical Rule states that:A.
for a bell shaped frequency distribution, approximately 68% of the observations are in the range of plus or minus one standard deviation.
B.
for a positively skewed frequency distribution, approximately 75% of the observations are in the range of plus or minus one standard deviation.
C.
for a bell shaped frequency distribution, approximately 75% of the observations are in the range of plus or minus one standard deviation.
D.
for a positively skewed frequency distribution, approximately 68% of the observations are in the range of plus or minus one standard deviation.
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举一反三
【单选题】(7-1)已知类 B 是类 C 的父类,则 不正确的语句是( )。
A.
B x = new B( );
B.
B x = new C( );
C.
C x = new C( );
D.
C x = new B( );
【单选题】已知类 B 是类 C 的父类,( )语句不正确。
A.
(A) Bx1=new B();
B.
(B) B x1=new C();
C.
(C) C x1=new C();
D.
(D) C x1=new B();
【单选题】下列说法中不属于网络着作权侵权行为表现形式的是
A.
擅自将网上作品下载并发表在传统媒体上
B.
擅自将传统媒体上发表的作品在网站上传播
C.
擅自通过网上登载作品使公民或法人社会评价降低
D.
擅自将传统媒体上发表的作品移植到网站上
【单选题】已知类 B 是类 C 的父类,( )语句不正确。
A.
B x1=new B();
B.
B x1=new C();
C.
C x1=new C();
D.
C x1=new B();
【简答题】什么叫条件反射?条件反射有哪两种主要类型?
【单选题】What made people healthier and let them five longer lives in the middle part of the 20th century?
A.
Improved living conditions
B.
New ways to help people get over diseases.
C.
Many inventions in industry.
D.
Industrialization in developing countries.
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