给定了空间直角坐标系的三维空间中，所有终点都在一个平面上的向量构成子空间（ ）.
查看答案
每一个n维线性空间都可以表示成n个一维子空间的直和（ ）.
A. 对
B. 错
According to the essay, people are encouraged to study intercultural communication to _______.
A. better understand their own culture
B. know more about cultural differences
C. promote their business in foreign countries
D. better communicate with people from different cultural groups
Which of the following statements about the reasons for the September 11 attacks is NOT true?
A. Individuals of different sexes, ages, ethnicity, races, languages and religions can never coexist peacefully.
B. It is caused by the continuing frustration with lack of attention paid to Jewish-Palestinian conflict.
C. Americans ignore the suffering of the Palestinian people.
D. The attackers were irritated at the United States.
Why does the author recommend studying intercultural communication matters strategically to the U.S. business?
A. It will facilitate the prosperity of economy by providing more employees.
B. It will better the economic climate for U.enterprises.
C. It will attract more intercultural trainers to work for U.companies.
D. It will promote the American companies' business globally.
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