如图为一色盲家系谱图,若其中1号与2号个体婚配,则后代患病概率是
A:12
B:14
C:13
D:18
——Mike, you look so excited.——Yeah! There____ a basketball game played by Yao Ming this evening.
利用图1装置做“验证机械能守恒定律”实验.