在社会生活中,青年志愿者是一道亮丽的风景线,他们无私奉献的行为( )
A:诠释了严谨的工作态度
B:延伸了自己的生命
C:展示了多彩的生命世界
D:揭示了艰苦的工作环境
若同一个圆的内接正三角形、正方形、正六边形的边长分别记作a3,a4,a6,则a3:a4:a6等于( )
用所给单词填空
(1)Sometimes we ____ food at home. (2)I ____ drinking milk. (3)We often ____ CCTV news at 7:00 in the evening. (4)I ____ the Internet once a day.(5)The results for “read English books”____ fun.(6)How often do you ____ to the English corner? (7)Everyone will____ you if you need any help.(8)The sun ____ once a day. (9)Walking can ____ you in good health.(10)I____ nine hours every night.
无论a取何值下列说法正确的是( )