某工地发生多人食物中毒,经化验为误食工业用盐亚硝酸钠(NaNO2)所致。NaNO2中氮元素的化合价是( )
A:+5
B:+4
C:+3
D:+2
George _________ too far. His coffee is still warm.
当你到达一个陌生的城市时,需要购买一幅地图,选择下列哪幅图最合适( )
下图是中国1944年发表的一幅漫画,该漫画体现的政治立场是( )
—Kate, I don't think we can go to the Palace Museum by bike on time.—You mean it's _______ for us to take a taxi there?