判断对错.
一个平行四边形的底是8cm,高是4cm.一个底和面积与它相等的三角形,高一定是2cm
What is Jim's mother doing now?
下列加下划线字的注音都正确的一项是( )。
My time in the middle school was one of ________ periods of my life.
选出不是判断句的一项( )