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【單選題】
化學科學需要借助化學專用語言描述。下列有關化學用語正確的是（ ）
A.
![]()
的電子式![]()
B.
乙烯分子的結構式![]()
C.
乙酸的結構簡式 ![]()
D.
硫原子的原子結構示意圖：![]()
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舉報參考答案：
舉一反三
【單選題】The manager devotes all his spare time ______ the violin.
A.
to practise
B.
to practising
C.
in practising
D.
for practising
【單選題】Last weekend, I _____ my washing machine ______.
A.
had; repair
B.
had; repairing
C.
had; repaired
D.
had; to repair
【單選題】If you have to change subway lines on a single trip, _____.
A.
you have to pay each time
B.
you should buy another ticket from the machine
C.
you must ask for the driver’s permission
D.
you just need to pay once
【單選題】It’s helpful to put children in a situation ____ they can see themselves differently.
A.
that
B.
when
C.
which
D.
where
【單選題】“The child’s life is not in er any more,” the doctor said ________.
A.
in service
B.
in relief
C.
in peace
D.
in order
相關題目：
【單選題】The manager devotes all his spare time ______ the violin.
A.
to practise
B.
to practising
C.
in practising
D.
for practising
【單選題】Last weekend, I _____ my washing machine ______.
A.
had; repair
B.
had; repairing
C.
had; repaired
D.
had; to repair
【單選題】If you have to change subway lines on a single trip, _____.
A.
you have to pay each time
B.
you should buy another ticket from the machine
C.
you must ask for the driver’s permission
D.
you just need to pay once
【單選題】It’s helpful to put children in a situation ____ they can see themselves differently.
A.
that
B.
when
C.
which
D.
where
【單選題】“The child’s life is not in er any more,” the doctor said ________.
A.
in service
B.
in relief
C.
in peace
D.
in order
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