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【單選題】

用一只雌蛙和一只雄蛙,若用人工方法孕育出1000只蝌蚪,從理論上推算,至少需要卵原細胞和精原細胞的數量分別是

A.
280和1000
B.
4000和2000
C.
1000和1000
D.
1000和250
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【單選題】The author's purpose in writing the passage is to ____________.
A.
tell us the earthquake taking place in Yunnan has caused 5,000 homeless
B.
warn the people in mountainous areas in Yunnan to take care of earthquake
C.
call on more help from the people all over the country
D.
yze why the earthquake took place in this area
【單選題】The earthquake took place ___________.
A.
in the early morning
B.
at noon
C.
in the afternoon
D.
at night
相關題目:
【單選題】The author's purpose in writing the passage is to ____________.
A.
tell us the earthquake taking place in Yunnan has caused 5,000 homeless
B.
warn the people in mountainous areas in Yunnan to take care of earthquake
C.
call on more help from the people all over the country
D.
yze why the earthquake took place in this area
【單選題】The earthquake took place ___________.
A.
in the early morning
B.
at noon
C.
in the afternoon
D.
at night
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