A:CBr2F2
B:CH3CH2OH
C:CH3CH2CH3
D:CH3CH(OH)COOH
you sing?
时钟的分针1小时转____ 度,时针1小时转____ 度;时钟的分针1分钟转____ 度,时针1分钟转____ 度.
下列农业生产成果是通过对自然因素的改造而取得的是( )
I feel strongly that each of us has a part ____ ____ in making China more powerful.