Why did Katie stop to talk to a little girl?
A. Because the girl was sleeping on the street.
Because the girl was standing on the street.
C. Because the girl was crying loudly on the street.
D. Because the girl was walking alone on the street.
How did Katie know the mum was alive?
A. She saw the mum moving.
B. She saw the mum breathing.
C. She found the mum sleeping.
D. She found the mum shedding tears.
Why didn't Katie think she herself was a hero?
A. Because the mum was only sleeping.
Because the mum was only frightened.
C. Because she did what anyone else would do.
D. Because she only did what the girl asked her to do.
我国法律规定既可以有国家标准、又可以有地方标准的环境标准是（ ）
A. 环境基准
B. 环境基础标准
C. 环境方法标准
D. 环境质量标准和污染物排放标准
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