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【單選題】
在調(diào)查人類先天性腎炎的遺傳特點(diǎn)時(shí)，雙親都患病的幾百個(gè)家庭中，所有子女中的女兒全部患病，如果兒子中正常與患病的比例為l∶2。對(duì)此調(diào)查結(jié)果正確的解釋是
A.
先天性腎炎是一種常染色體遺傳病
B.
先天性腎炎是一種隱性遺傳病
C.
被調(diào)查的母親中雜合子占2／3
D.
被調(diào)查的家庭數(shù)過少難以下結(jié)論
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舉報(bào)參考答案：
舉一反三
【單選題】What do you think of the differences between British and American people?
A.
Their differences are very small.
B.
The differences are very great.
C.
There are no differences between them.
D.
Some people think there are, but some people dont think so.
【單選題】What will the woman do next morning?
A.
Return home.
B.
Check out.
C.
Attend a party.
【單選題】Where is the man going next?
A.
To the hospital.
B.
To the gate of the factory.
C.
To his dormitory.
【單選題】What do the British think Americans are like?
A.
They are strange but friendly.
B.
They are poor.
C.
They are rich but unfriendly.
D.
They are happy in trouble.
相關(guān)題目：
【單選題】What do you think of the differences between British and American people?
A.
Their differences are very small.
B.
The differences are very great.
C.
There are no differences between them.
D.
Some people think there are, but some people dont think so.
【單選題】What will the woman do next morning?
A.
Return home.
B.
Check out.
C.
Attend a party.
【單選題】Where is the man going next?
A.
To the hospital.
B.
To the gate of the factory.
C.
To his dormitory.
【單選題】What do the British think Americans are like?
A.
They are strange but friendly.
B.
They are poor.
C.
They are rich but unfriendly.
D.
They are happy in trouble.
參考解析：
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