题目内容
（请给出正确答案）
[主观题]
The big data sets can be obtained from the physical world, such as
A、economics
B、social networks
C、sensor networks
D、transportation
提问人：网友xxylkl
发布时间：2022-01-07
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This latest cloning project-and the wealth of information scientists hope it will provide- is just one of the many such animal-cloning experiments under way. Even as the human- cloning debate has filled headlines, scientists have cloned everything from mice to Iambs to bulls.
And this is only the beginning, say cloning supporters. For instance, breeding disease- resistant cows could save people's lives in third-world countries. And by cloning endangered species, animals such as the prairie chicken and desert bighorn sheep could be saved from extinction.
(23)
A．They are little sheep.
B．They are mice.
C．They are lambs.
D．They are little pigs.
