单项选择题
关于细胞核雄性不育,下列说法不正确的是( )。 A、油菜和水稻的“两系”杂交种均利用的是细胞核雄性不育性 B、...
单项选择题关于细胞核雄性不育,下列说法不正确的是( )。 A、油菜和水稻的“两系”杂交种均利用的是细胞核雄性不育性 B、显性核雄性不育在生产上能利用 C、细胞核雄性不育的恢复源比核质互作的广泛 D、水稻“两系”杂交种的雄性不育是一种环境诱导型,合适的光和温可诱导单株的育性发生转换
9. At the presentation stage, English language teachers...
判断题9. At the presentation stage, English language teachers encourage students to use what they have learned and practiced performing communicative tasks.
Sitting under an apple tree one night, an idea came to ...
判断题Sitting under an apple tree one night, an idea came to Newton.