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【多選題】
下列關于力做功的說法中正確的是
A.
滑動摩擦力對物體一定做負功
B.
靜摩擦力對物體可能做正功
C.
作用力的功與反作用力的功代數和一定為零
D.
合外力對物體不做功，物體一定處于平衡狀態
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舉報參考答案：
舉一反三
【單選題】What is not mentioned in the sports news?
A.
The teams which played last night.
B.
The Wingers had one win and four defeats.
C.
How many wins the BBS has had altogether.
【單選題】What does the California scientists’ finding tell us?
A.
A relationship between the coffee drinking and the heart-disease increase in women.
B.
A relationship between alcohol drinking and the heart-disease increase in men.
C.
A relationship between tea drinking and the heart-disease decrease in women.
【單選題】How long has Windsor Castle been a royal palace?
A.
Over 900 years.
B.
Over 1000 years.
C.
Over 1200 years.
相關題目：
【單選題】What is not mentioned in the sports news?
A.
The teams which played last night.
B.
The Wingers had one win and four defeats.
C.
How many wins the BBS has had altogether.
【單選題】What does the California scientists’ finding tell us?
A.
A relationship between the coffee drinking and the heart-disease increase in women.
B.
A relationship between alcohol drinking and the heart-disease increase in men.
C.
A relationship between tea drinking and the heart-disease decrease in women.
【單選題】How long has Windsor Castle been a royal palace?
A.
Over 900 years.
B.
Over 1000 years.
C.
Over 1200 years.
參考解析：
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