下列有关遗传信息传递过程的叙述,错误的是( ) A.DNA复制、转录及翻译过程都遵循碱基互补配对原则B.核基因转录形成的mRNA需穿过核孔进入细胞
下列物质按沸点降低顺序的一组是 A. CI4、CBr4、CCl4、CF4 B. O、S、Se、Te C. HF、HCl、HBr、HI D.H2Te、H2Se、H2S、H2O
一个不透明的袋中装有除颜色外均相同的5个红球和3个黄球,从中随机摸出一个,摸到黄球的概率是( )(A) (B) (C) (D)
The foundation of any relationship, whether it be with a business associate, couple, client, parent or friend, is trust. Trust is not something that can be built with quick techniques. It is someth
Healthy eating starts with learning new ways to eat,such as adding more fresh fruit and vegetables,and cutting back on fooods that have lots of fat, salt and sugar. Healthy eating will help you f
(四)【古典文学】阅读下面【甲】【乙】两段文言文,完成后面21—25题。(共14分)【甲】公与之乘。战于长勺。公将鼓之。刿曰:“未可。”齐人
提供热量最多的一餐应该是 A.早餐 B.晚餐 C.午餐 D.夜宵
根据要求填空: (1)FeSO4可转化为FeCO3,FeCO3在空气中加热可制得铁系氧化物材料 已知25℃,101kPa时:4Fe(s)+3O2(g)=2Fe2O3(s) ΔH=-1648kJ/mol C(s)+O2(g)=CO2(g) ΔH=-393kJ/mol 2