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【单选题】
一个密闭容器中加入甲、乙、丙、物质，在一定条件下发生化学反应，测得数据见下表．下列说法中正确的是（ ） 物质 甲 乙 丙 丁 反应前质量 8g 35g 5g 8g 反应后质量 2g X 5g 42gA.
丁可能是化合物
B.
在该反应中，丙物质一定做催化剂
C.
该反应是化合反应
D.
在该反应的化学方程式中，甲、乙的化学计量数之比为3：l4
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【单选题】How does Ying-ying's story in "The Moon Lady" reflect her life and that of her daughter?
A.
She says that she and her daughters are both lost.
B.
She says that she and her daughter could have been stars.
C.
She says that she and her daughter were destined to become singers.
D.
She says that she feels that she and her daughter could both have played the role of the Moon Lady.
【简答题】When does the lady usually go to bed?
【简答题】同他们的父母保持距离
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