A:25%
B:80%
C:10%
D:20%
习惯上划分东西半球的界线是
制作“基因型身份证”需要从人体细胞中提取遗传信息,下列不能用来提取这些信息的材料是( )
_________ only 20 minutes to go before the train left, I felt uneasy in the taxi to the railway station.