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【简答题】
两个变量之间仅因一个第三变量之故而似乎相关,这种关系称为“伪相关”,对不对?
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【简答题】根据对话内容，补出所缺单词。 Li Lei: Who's ______(1) man? Jim: He's my father. Li Lei: Who's that woman? Jim: ______(2) my mother. Li Lei: And ______ (3) that your sister? Jim: Yes, _______ (4) is. Li Lei: What's h...
【简答题】阅读理解 This is a picture of the twin brothers, Li Lei and Li Ping's bedroom. It's not big, but it's very bright (明亮). It's a nice room. In the bedroom, we can see two beds, two chairs, two desks, and a ...
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