Hamsters have sleeping problems.
A. Right
B. Wrong
C. Not mentioned
查看答案
There are nurse-managers instead of ______.
Which of the following would be the most appropriate title for the passage？
A. The Proportion of Test-tube Girls to Boys
B. Are Test-tube Babies Healthy？
C. The Social Meaning of the Idea of Test-tube Babies
D. The Moral Issue Associated with Test-tube Babies
SCN plays a role in daily rhythms.
A. Right
B. Wrong
C. Not mentioned
the identification of the internal clock may help to relieve human sleeping problems.
A. Right
B. Wrong
C. Not mentioned
微信支付 
支付宝支付