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【單選題】

在稀硫酸中加入一塊銅片,銅片不溶解,則加入下列物質后,能使銅片溶解的是(   )

A.
稀鹽酸
B.
硝酸鉀
C.
硫酸鈉
D.
氫氧化鈉
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參考答案:
舉一反三
【單選題】What did the boy’s mother do when she couldn’t find her son?
A.
She checked the water tank.
B.
She called the police and her husband.
C.
She turned to her neighbor for help.
D.
She searched the town from top to bottom
【單選題】Why did the boy hide in a bedroom cupboard?
A.
He thought it was a good place to sleep.
B.
He wanted to start a big rescue operation.
C.
He didn’t think he could be easily found there.
D.
He is Australia’s unofficial hide-and-seek champion.
相關題目:
【單選題】What did the boy’s mother do when she couldn’t find her son?
A.
She checked the water tank.
B.
She called the police and her husband.
C.
She turned to her neighbor for help.
D.
She searched the town from top to bottom
【單選題】Why did the boy hide in a bedroom cupboard?
A.
He thought it was a good place to sleep.
B.
He wanted to start a big rescue operation.
C.
He didn’t think he could be easily found there.
D.
He is Australia’s unofficial hide-and-seek champion.
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