A:二次革命
B:护国战争
C:护法战争
D:武昌起义
相关操作
选取的试剂
A
破碎鸡血细胞
蒸馏水
B
溶解核内DNA
2mol/L NaCl溶液
C
提取杂质较少的DNA
冷却的95%的酒精
D
DNA的鉴定
双缩脲试剂
—Sorry,I have no time to help you cook.I have a lot of work to do.
—________You have been playing computer games all morning.
下列说法中,不正确的是( )