单项选择题

Further study should be made about the age of clones.

A． Right
B． Wrong
C． Doesn't say
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单项选择题
Dolly will live longer than an ordinary lamb.
A． Right
B． Wrong
C． Doesn't say
单项选择题
Among the three mentioned the sheep cloned from a I-day old embryonic cell is the youngest.
A． Right
B． Wrong
C． Doesn't say
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