—Do you mind my opening the window to let the fresh air in?—__________. I also would like to breathe in some fresh air.
A:Never mind
B:Not at all
C:That's all right
D:You'd better not
0.1 mol•L-1 KHCO3溶液中下列表达式不正确的是
在显微镜下观察活金鱼的尾鳍时,寻找毛细血管的方法是( )