Deng Yaping was born _____ February 6th,_爱下问搜题

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问题选择题

Deng Yaping was born _____ February 6th, 1973. [ ]

A. on

B. to

C. at

D. in

答案

答案：A

选择题

下列各物质若n值相等时，其同类的同分异构体最多的是

A．C_nH_2n+2O的醇

B．C_nH_2nO的醛

C．C_nH_2nO₂的羧酸

D．C_nH_2n+2的烃

判断题

民以食为天、天以食为先。食品安全是天大的事。