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The mother didn't know___________ is to blame for the broken glass as it happened while she was out.
1年前
一定质量的理想气体封闭在气缸内,当用活塞压缩气体时,一定增大的物理量为 A.气体分子的平均动能 B.气体分子的势能 C.气体的内能 D.气体密度
1年前
A: Are you online? B: Yes, I am reading a letter. A: How ___1___ do you use the Internet?
1年前
1年前
Listen to _____ music of the film. [ ]
1年前