问题
选择题
An amount of money by his father.[ ]
A. left
B. were left
C. was left
D. leaves
答案
答案：C
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An amount of money by his father.[ ]
A. left
B. were left
C. was left
D. leaves
答案：C
nC（s）+D（g）达平衡。若维持温度不变，增大压强，测得混合气体的平均相对分子质量不变，则下列判断正确的是( )