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【單選題】
在化學反應aA+bB = cC+dD中，下列說法正確的是
A.
化學計量數a與b之和一定等于c與d之和
B.
反應物A和B的質量比一定等于生成物C和D的質量比
C.
若取zgA和zgB反應，生成C和D的質量總和不一定是2zg
D.
若A和C都是鹽，則該反應一定是復分解反應
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舉報參考答案：
舉一反三
【單選題】As to most people, what’s the purpose for learning a foreign language？
A.
To travel to that country.
B.
To work better.
C.
To do business.
【單選題】What do the posters say？
A.
They can teach people to speak English better.
B.
They can teach people to speak a foreign language within a short time.
C.
They can teach people to speak a foreign language about everything.
【單選題】What language is easy to learn？
A.
The mother tongue.
B.
A foreign language.
C.
English.
【單選題】The cakes are delicious. He’d like to have ______ third one because ______ second one is rather too small.
A.
a; a
B.
不填; the
C.
a; the
D.
the; a
相關題目：
【單選題】As to most people, what’s the purpose for learning a foreign language？
A.
To travel to that country.
B.
To work better.
C.
To do business.
【單選題】What do the posters say？
A.
They can teach people to speak English better.
B.
They can teach people to speak a foreign language within a short time.
C.
They can teach people to speak a foreign language about everything.
【單選題】What language is easy to learn？
A.
The mother tongue.
B.
A foreign language.
C.
English.
【單選題】The cakes are delicious. He’d like to have ______ third one because ______ second one is rather too small.
A.
a; a
B.
不填; the
C.
a; the
D.
the; a
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