做2个变量积差法的相关系数的假设检验，已知n＝10，查t界值表时其自由度是( )
A. 7
B. 8
C. 9
D. 10
E. 6
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We can infer from the passage that the author ______.
A. prefers dogs to cats
B. prefers cats to dogs
C. likes dogs as well as cats
D. likes neither dogs nor cats
______ evidence that language-acquiring ability must be stimulated.
A) There being
B) If being
C) It is
D) There is
In their work, Ghoshal and Bartlett discuss______.
A. changes in business organizations
B. contracts between employers and employees
C. employment environment
D. management skills
______ she realized it was too late to go home.
A) No sooner it grew dark than
B) Hardly did it grow dark that
C) Scarcely had it grown dark than
D) It was not until dark that
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