搜题
王老师:19139051760(拨打)
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第1题

A hypothesis is a possible explanation of a problem.
A.正确
B.错误
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第2题

A letter contains both verbal and nonverbal symbols.
A.正确
B.错误
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第3题

A letter is a format that is common in the business world.
A.正确
B.错误
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第4题

A multinational company simply sells products or purchases goods from another country.
A.正确
B.错误
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