A:上述反应属于取代反成
B:碳酸亚乙酯的二氯代物只有一种
C:碳酸亚乙酯中的所有原子处于同-平面内
D:1mol碳酸亚乙酯最多可消耗2molNaOH
The job of the speaker
A____
The first thing that you have to do
Write a ____about yourself
The third thing to do
Read the paper to the____
Things you can't do
Don't ____that will make everyone laugh.
The time to get everything ready
____
下列有关癌细胞的叙述,错误的是
水蜜桃水多且味甜,毛桃又酸又硬口味差,将水蜜桃的芽接到毛桃的枝条上,这样由新芽发育而成的枝条上所结的果实应该是( )