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【單選題】
關(guān)于用光學(xué)顯微鏡觀察有絲分裂的試驗(yàn)，下列敘述正確的是（ ）
A.
一般用洋蔥鱗片葉內(nèi)表皮細(xì)胞作為試驗(yàn)材料
B.
試驗(yàn)材料用醋酸洋紅解離
C.
解離后的試驗(yàn)材料是活的
D.
從低倍鏡轉(zhuǎn)到高倍鏡，視野中的細(xì)胞數(shù)目減少
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舉報(bào)參考答案：
舉一反三
【單選題】John received an invitation to dinner, and with this work ____ , he gladly accepted it .
A.
finished
B.
finishing
C.
having finished
D.
was finished
【單選題】What do we learn about Mary?
A.
She is on vacation.
B.
She travels around the world
C.
She collects postcards
【單選題】I had just stepped out of the bathroom and was busy drying myself with a towel ____ I heard the steps.
A.
while
B.
when
C.
since
D.
after
相關(guān)題目：
【單選題】John received an invitation to dinner, and with this work ____ , he gladly accepted it .
A.
finished
B.
finishing
C.
having finished
D.
was finished
【單選題】What do we learn about Mary?
A.
She is on vacation.
B.
She travels around the world
C.
She collects postcards
【單選題】I had just stepped out of the bathroom and was busy drying myself with a towel ____ I heard the steps.
A.
while
B.
when
C.
since
D.
after
參考解析：
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