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【單選題】
一個游泳池是圓柱形的，池子深2米，直徑10米。進水速度5立方每分鐘，排水速度2立方每分鐘。如果管理人員在進水時忘記關閉排水閥門，多長時間池子會注滿水？
A.
約33分鐘
B.
約47分鐘
C.
約52分鐘
D.
約69分鐘
E.
約74分鐘
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舉報參考答案：
舉一反三
【單選題】The moment the author got down to the river bank he saw __________.
A.
the calf was about to fall into the river
B.
Ma Sha was placing the calf on the rock
C.
the calf was washed away by the rising water
D.
Ma Sha was holding the calf against the rushing water
【單選題】How did t he calf feel about the mother elephant's roaring？
A.
It was a great comfort.
B.
It was a sign of er.
C.
It was a call for help.
D.
It was a musical note.
【單選題】With the best training and his excellent physical ability, the athlete believed that he could ______ win a silver medal.
A.
at most
B.
at best
C.
at least
D.
at first
【單選題】What can be the best title for the text？
A.
A Mother's Love
B.
A Brave Act
C.
A Deadly River
D.
A Matter of Life and Death
【單選題】My father, as well as my brother and I, ______ to swim tomorrow.
A.
am going
B.
goes
C.
will go
D.
go
相關題目：
【單選題】The moment the author got down to the river bank he saw __________.
A.
the calf was about to fall into the river
B.
Ma Sha was placing the calf on the rock
C.
the calf was washed away by the rising water
D.
Ma Sha was holding the calf against the rushing water
【單選題】How did t he calf feel about the mother elephant's roaring？
A.
It was a great comfort.
B.
It was a sign of er.
C.
It was a call for help.
D.
It was a musical note.
【單選題】With the best training and his excellent physical ability, the athlete believed that he could ______ win a silver medal.
A.
at most
B.
at best
C.
at least
D.
at first
【單選題】What can be the best title for the text？
A.
A Mother's Love
B.
A Brave Act
C.
A Deadly River
D.
A Matter of Life and Death
【單選題】My father, as well as my brother and I, ______ to swim tomorrow.
A.
am going
B.
goes
C.
will go
D.
go
參考解析：
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