看漫画中两人的行为,我们可从中得出的结论是( )
A:经营者的行为,其结果是可以得到很大的利益
B:经营者的行为,是一种童叟无欺的行为
C:经营者的行为,违背了经济活动中诚实守信的原则
D:经营者的行为,,是一种粗心大意的行为
根据材料完成下列各题。BeethovenBorn in 1770 in GermanyA musician (音乐家)Died in 1827Florence NightingaleBorn in Italy on May 12th, 1820An English nurseDied in 1910Bill GatesBorn in I955 in the USAWrote Business @ the Speed of ThoughtOwns MicrosoftThomas EdisonBorn in 1847 in the USAMade over 1,000 inventions (发明)Died in 1931Yao MingBorn on September 12th, 1980 in Shanghai, ChinaA basketball playerPlayed for the Houston Rockets, the USA
如图,已知菱形ABCD的对角线AC 、BD相交于点O,延长AB至点E,使BE=AB,连接CE.
先化简,再求值: x2−2x+1x2+x ÷(1﹣ 2x+1 ),其中x= 3 .
最近,俄罗斯科学家利用第72号元素铪和第74号元素钨,精确测出月球至少比地球早700万年形成。铪、钨两种元素原子的本质区别是