问题 选择题

制取下列元素的单质时,反应原理相同的是

A.Cl、Br、P

B.Mg、Al、Cu

C.Fe、Sn、Br

D.Si、P、Cl

答案

答案:B

元素在自然界主要以正价存在时,通过还原反应制得单质,主要以负价存在时,通过氧化反应制得单质,仅B项元素全以正价化合物形态存在于自然界中。

默写题

1.塞下秋来风景异,                                ;

2.妇姑荷箪食,                             

3.                             ,背灼炎天光。

4.鸡声茅店月,                             

5.                        ,一任群芳妒,                                   ,只有香如故。

6.池上碧苔三四点,                                 

7.                                ,日高人渴漫思茶。

8.                                                                   。莫道不销魂,                              

                             

9.千古兴亡多少事,                                                       

10.列国周齐秦汉楚,                                                                                                              ; 11.官船来往乱如麻,                                                                                      

12.且壮士不死即已,                                                           

13.夫                                                               ;聂政之刺韩傀也,                          

                                                             。 

14.臣本布衣,                                                                                     

15.                                           ,此先汉所以兴隆也;                                           ,此后汉所以倾颓也。

16.今南方已定,                                                                      

                                                                                                ,此诚所以报先帝而忠陛下之职分也

17.陛下亦宜自谋,                                                               ,深追先帝遗诏。

选择题