①仿写:爱憎(含反义词):____、____、____、____
②仿写:打算盘(动词+名词):____、____、____、____
下列关于用高倍显微镜观察叶绿体和线粒体的实验中,说法不正确的是()
改错题
These days we have spent as much time as we could prepare international flower exhibition.
已知双曲线 x2-y22=1的焦点为F1、F2,点M在双曲线上且 MF1→•MF2→=0,则点M到x轴的距离为( )