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问题
选择题
已知a,b,c都是负数,且
|x-a|+|y-b|+|z-c|=0
,则xyz是( )
A.正数
B.非负数
C.负数
D.非正数
答案
答案:
C
补全对话,情景问答
读一读,选择正确的问句。
( ) It is hot and sunny.
( ) I'm going to the office.
( ) He is driving a car.
( ) Across from the school.
( ) Yes, I want to buy a dress.
A. Where is the gym?
B. How is the weather?
C. May I help you?
D. What is he doing?
E. Where are you going?
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名词解释
EDPS
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