单项选择题

A．Sperm, cells, DNA and other genes.
B．Sperm, cells, DNA and other products.
C．Sperm, organs, DNA and other genes.
D．Sperm, organs, DNA and other products.
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单项选择题
A．Other beasts.B．Any prey on the earth.C．People’s domestic animals.D．The man’s opponents.
A．Other beasts.
B．Any prey on the earth.
C．People’s domestic animals.
D．The man’s opponents.
单项选择题
A．About 12:00 a.m.B．About 3:00 a. m.C．About 5:00 a.m.D．About 6:00 a. m.
A．About 12:00 a.m.
B．About 3:00 a. m.
C．About 5:00 a.m.
D．About 6:00 a. m.
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