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【多選題】
關于坐標系，下列說法正確的是( )
A.
建立坐標系是為了定量描述物體的位置和位置的變化
B.
坐標系都是建立在參考系上的
C.
坐標系的建立與參考系無關
D.
物體在平面內做曲線運動，需要用平面直角坐標系才能確定其位置
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舉報參考答案：
舉一反三
【單選題】From the text, we learn that Baccarat and Sorrenbourg are the names of ________.
A.
towns
B.
churches
C.
museums
D.
mountains
【單選題】What does the woman imply?
A.
She didn’t clean the apartment.
B.
She’ll help the man clean his apartment.
C.
She needs to clean the lab.
【單選題】What does the man imply?
A.
His coach didn’t help him enough.
B.
He had no chance of winning.
C.
He didn’t follow his coach’s advice.
【單選題】What does the man say about the activities?
A.
They aren’t very good because they’re so different.
B.
He thinks they should do both.
C.
It doesn’t matter which one they do.
相關題目：
【單選題】From the text, we learn that Baccarat and Sorrenbourg are the names of ________.
A.
towns
B.
churches
C.
museums
D.
mountains
【單選題】What does the woman imply?
A.
She didn’t clean the apartment.
B.
She’ll help the man clean his apartment.
C.
She needs to clean the lab.
【單選題】What does the man imply?
A.
His coach didn’t help him enough.
B.
He had no chance of winning.
C.
He didn’t follow his coach’s advice.
【單選題】What does the man say about the activities?
A.
They aren’t very good because they’re so different.
B.
He thinks they should do both.
C.
It doesn’t matter which one they do.
參考解析：
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