教育统计学属于应用统计学。()
参考答案:对
如图所示,把一支点燃的蜡烛放在距离凸透镜2倍焦距以外的地方,在透镜的另一侧调节光屏位置可找到一个清晰的像。这个像是下图中的:
A.
B.
C.
D.
They were close ______ each other in high school and now are still ______ touch.
A.to; with
B.to; in
C.with; in
D.with; with