设∑：x2＋y2＋z2＝1(z≥0)，∑1为∑在第一卦限的部分，则()．
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The main idea of the passage is -
A. you should pay more attention to your gesture.
B. nonverbal elements play an important role in communication interchange
C. the importance of body language
D. you should not pay attention to your pronunciation and intonation
Disputes with a neighbor can bring very bad feelings to people.
A. Right
B. Wrong
C. Not mentioned
Which of the following statement is NOT true？
A. Sticking out tongue at someone is a sign of respect in New Zealand.
B. Sticking out tongue at someone is irrespective in America.
C. To form. a circle by touching the thumb and forefinger means "zero" to Brazilians.
D. To form. a circle by touching the thumb and forefinger means "OK" to Americans.
One can just forget about disputes because they will be forgotten by neighbors over time.
A. Right
B. Wrong
C. Not mentioned
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