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【单选题】
某温度下,一容器中含有 2.0mol O 2 , 3.0mol N 2 及 1.0mol Ar 。如果混合气体的总压为 a kPa ,则 p(O 2 ) 为A.
a / 3 kPa
B.
a / 6 kPa
C.
a / 4 kPa
D.
a / 2 kPa
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A.
She doesn't like going to the movies.
B.
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C.
She is recovering from an illness.
D.
She doesn't like dancing.
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A.
She didn't buy the coat.
B.
She bought the coat on sale.
C.
She was glad that the coat fit her so well.
D.
She thought the coat was too expensive,
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