I _______ him in a way. Some of his ideas are right.
A:speak to
B:come to
C:stay with
D:agree with
蜡烛放在离凸透镜20cm的主光轴上,在透镜的另一侧光屏上得到放大的像,若把蜡烛向透镜方向移动8cm,则所成的像一定是 ( )
下列四项中,能用于观察四分体的实验材料是( )
81的平方根为____
如图,已知∠1=∠2,则添加下列一个条件后,仍无法判定△ABC∽△ADE的是( )