唇红缘
参考答案:
唇红与皮肤交界处名唇红缘(vermilion border)。
在中国古代“家国一体”的社会中,忠孝观念源远流长,其源头是[ ]
A.宗法制
B.郡县制
C.君主专制
D.中央集权制
These batteries for electric cars, some scientists claim, are bound to be too heavy, too bulky and unable to store enough electricity.
A.clumsy
B.fussy
C.nasty
D.rusty