若两个变量存在负线性相关关系，则建立一元线性回归方程得到的判定系数R平方的取值范围是
A. [0,1]
B. [-1,0]
C. [-1,1]
D. 小于0的任意数
What following fact is NOT true about The U.S.A. and World War I?
A. Shortly after World War I erupted in Europe, President Wilson called on Americans to be “neutral in thought as well as deed.” The United States, however, quickly began to lean toward German.
B. American involvement in World War I lasted from the summer of 1917 to the armistice that ended the war in November 1918 --- just over one year.
C. America largely profited from trading with both the Allies and Central Powers.
D. The newspaper publication of Zimmerman Note, an intercepted telegram led Wilson to demand a declaration of war.
The 1920s era went by such following names except :
A. Jazz Age
B. The Age of Intolerance
C. The Roaring Twenties
D. The Age of Tolerance
Which of the following term is NOT associated with the Roaring Twenties?
A. Bootleggers
B. Flappers
C. Prohibition
D. Hippies
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