C语言 ch1=((ch2)&(0xf0)); ch3=key[ch1]; 可以通过编译,但 ch3=key_break
C语言 ch1=((ch2)&(0xf0)); ch3=key[ch1]; 可以通过编译,但 ch3=key_break
CH2=C-CH2-CH3 | CH2 | CH3 是什么?
CH3-C(CH3)==C(CH3)-CH2-CH2-CH=CH-CH3的同分异构体
CH3-CH2-CH=C
CH2=C-CH3 | CH2 | CH3 的系统命名是什么
CH2=CH2怎么变成CH3-CH3
CH3 CH3 CH3-CH-CH2-C=c-CH3 CH2CH2CH3 的系统命名
CH3-C(CH3)=CH2合成CH2=C(CH3)-COOH
(ch3)2c=chch2ch=ch2
(CH3)2C=CH2的名称
ch2=c(ch3)cooch3的转化
有机物命名CH2=C(CH3)COOCH2CH2OH