婴儿期易疲劳而进入睡眠状态的原因是()。
A.脑重量较轻
B.树突与轴突少而短
C.大脑的皮质较薄
D.神经髓鞘形成不完善
E.脑组织耗氧量大
参考答案:D
Will you see to _____ that my children are taken good care of while I am away?
A.it
B.me
C.yourself
D.them
什么叫零米温度?