In man, how many pairs of chromosomes do body cells contain？
A. Twenty-two.
B. Twenty-three.
C. Twenty-six.
D. Forty-six.
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Which of the following is true？
A. The American economic system is organized around a basically public-owned enterprise.
B. In a private-enterprise economy, individuals are allowed to own productive resources.
C. In the America economy, private property only contains the ownership of productive resources.
D. None.
Many films for cinema and television are financed by
A. Chicago companies
B. New York companies
C. United States companies
D. Seattle companies
A．opinionsB．effectsC．mannersD．functions
A. opinions
B. effects
C. manners
D. functions
折旧测量经济中的存量(如工厂、设备以及住宅设施等)由于被使用而减少的数值。 ()
A. 正确
B. 错误
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