A:CH2=CH﹣CH=CH2 1,3﹣二丁烯
B:CH3COOCH2CH2OOCCH3 乙二酸二乙酯
C:CH3CH2CH(OH)CH3 3﹣丁醇
D: 2﹣甲基丁烷
如图为女性生殖系统示意图,图中产生卵细胞并分泌雌性激素的器官是( )
给下面的句子选择合适的答语。
①Happy birthday! ____ A. Two books.
②How old are you? ____ B. Thank you.
③How many books? ____ C. You're welcome.
④Let's eat the cake. ____ D. I'm 10.
⑤Thank you. ____ E. Great.