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【简答题】
当两物体的接触面光滑无摩擦时，称为 ____ 。 [填空(1)] A. 光滑接触面
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【单选题】I have been expecting a letter from my friend Tom these days.
A.
for
B.
/
C.
to
D.
with
【简答题】回答下列句子都属于哪种类型(陈述句,疑问句,祈使句,感叹句) I got a letter from Tom yesterday.
【简答题】用方框中单词的正确形式填空。 meet, get , follow, land, jump 1. I _____ a letter from Tom yesterday. 2. Don't _____ down from the tree. It's erous. 3. A UFO _____ on Center Street while I was shopping. 4. I ___...
【单选题】听力原文：W: Hello, Li Ming. Have you heard from Tom recently? M: Yes. I got a letter from him yesterday. Who wrote a letter to Li Ming?
A.
Li Ming.
B.
Tom.
C.
A girl.
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