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【單選題】
在高等生物中，大約10萬到1億個生殖細胞中，才會有一個生殖細胞發生基因突變，這表明基因突變
A.
普遍發生
B.
大多有害
C.
隨機發生
D.
頻率很低
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舉報參考答案：
舉一反三
【單選題】Halley made his discovery ____________.
A.
by doing experiments
B.
by means of his own careful observation
C.
by studying the work of other scientists
D.
by chance
【單選題】Jay Chou’s musical talent is recognized by the following except ____________.
A.
his teachers
B.
fellow-singers
C.
producers
D.
fans
【單選題】Which of the following is NOT true about Jay Chou?
A.
Jay Chou is confident towards music.
B.
He is a determined man.
C.
He succeeded the first time he appeared on the stage.
D.
Though not good-looking, he has a gift for music.
【單選題】____________ make Jay Chou a success according to the passage.
A.
His luck and talent for music
B.
His talent for music and look
C.
His looks and luck
D.
His passion for music and hard work
【單選題】Edmund Halley worked out the orbit of ____________.
A.
some different comets appearing several times
B.
the same comet appearing at different times
C.
three different comets appearing three times
D.
several comets appearing at the same time
相關題目：
【單選題】Halley made his discovery ____________.
A.
by doing experiments
B.
by means of his own careful observation
C.
by studying the work of other scientists
D.
by chance
【單選題】Jay Chou’s musical talent is recognized by the following except ____________.
A.
his teachers
B.
fellow-singers
C.
producers
D.
fans
【單選題】Which of the following is NOT true about Jay Chou?
A.
Jay Chou is confident towards music.
B.
He is a determined man.
C.
He succeeded the first time he appeared on the stage.
D.
Though not good-looking, he has a gift for music.
【單選題】____________ make Jay Chou a success according to the passage.
A.
His luck and talent for music
B.
His talent for music and look
C.
His looks and luck
D.
His passion for music and hard work
【單選題】Edmund Halley worked out the orbit of ____________.
A.
some different comets appearing several times
B.
the same comet appearing at different times
C.
three different comets appearing three times
D.
several comets appearing at the same time
參考解析：
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