A:邻国之民不加少牺牲玉帛,弗敢加也
B:直不百步耳系向牛头充炭直
C:弃甲曳兵而走斩木为兵,揭竿为旗
D:不违农时,谷不可胜食也日出江花红胜火
Gogh and Leonardo da Vinci were known________their artistic achievements.
“文章合为时而著,歌诗合为事而作。”我国诗歌创作的黄金时代是( )
如图所示为定值电阻R1和R2中的I—U关系图.若将R1和R2并联后接在电压为6V的电源两端,则通过R1和R2的电流之比为____,R1和R2两端的电压之比为____,R1和R2消耗的功率之比为____.若将R1和R2串联在电压为6V的电路中,则R1和R2两电阻消耗的功率之比为____.