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
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
单项选择题
Dolly is exactly the same as an ordinary lamb.
A．Right
B．Wrong
C．Doesn't say
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