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【單選題】
格里菲思用肺炎雙球菌在小鼠身上進行了著名的轉(zhuǎn)化實驗，此實驗結(jié)果
A.
證明了DNA是遺傳物質(zhì)
B.
證明了RNA是遺傳物質(zhì)
C.
證明了蛋白質(zhì)是遺傳物質(zhì)
D.
證明了殺死的S型細菌體內(nèi)有轉(zhuǎn)化因子
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舉報參考答案：
舉一反三
【單選題】The underlined word “gulf” in the fourth paragraph means ______.
A.
different ideas between the mother and the daughter
B.
deep understanding between the old and the young
C.
free talks between mother and daughter
D.
part of the sea going far in land
【單選題】Which animal can’t visitors probably see at the New York Aquarium?
A.
Penguins.
B.
Pandas.
C.
Dolphins.
D.
Seals.
【單選題】In the situation described in the text, one good thing is that ________.
A.
the writer has a daily harvest of tomatoes
B.
the roses cost the writer little money
C.
someone will help the writer make the decision
D.
the writer can now enjoy both the roses and tomatoes
【單選題】What did mother do with her daughter’s letter asking forgiveness?
A.
She had never received the letter.
B.
For years, she often talked about the letter.
C.
She read the letter again and again till she died.
D.
She didn’t forgive her daughter at all in all her life.
【單選題】The writer’s purpose in writing the text is to ______.
A.
report on the findings of a study
B.
teach parents ways to keep order at the dinner table
C.
show the relationship between parents and children
D.
give information about family problems
相關題目：
【單選題】The underlined word “gulf” in the fourth paragraph means ______.
A.
different ideas between the mother and the daughter
B.
deep understanding between the old and the young
C.
free talks between mother and daughter
D.
part of the sea going far in land
【單選題】Which animal can’t visitors probably see at the New York Aquarium?
A.
Penguins.
B.
Pandas.
C.
Dolphins.
D.
Seals.
【單選題】In the situation described in the text, one good thing is that ________.
A.
the writer has a daily harvest of tomatoes
B.
the roses cost the writer little money
C.
someone will help the writer make the decision
D.
the writer can now enjoy both the roses and tomatoes
【單選題】What did mother do with her daughter’s letter asking forgiveness?
A.
She had never received the letter.
B.
For years, she often talked about the letter.
C.
She read the letter again and again till she died.
D.
She didn’t forgive her daughter at all in all her life.
【單選題】The writer’s purpose in writing the text is to ______.
A.
report on the findings of a study
B.
teach parents ways to keep order at the dinner table
C.
show the relationship between parents and children
D.
give information about family problems
參考解析：
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