According to the text, most hairless mammals______.
A. are walruses
B. are semi-aquatic
C. are covered in dense fur
D. have but a handful of fur
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描述发生的事情和解释发生的事情,不是心理学研究的基本原则。()
Mole rats are similar to humans in that they______.
A. are virtually hairless
B. live in underground colonies
C. have opposable thumbs
D. are able to kill parasites