依据统计数据绘制了如下尚不完整的统计图表.
在研究凸透镜成像实验中,当烛焰离凸透镜的距离小于焦距时,眼睛通过透镜观察到的虚像可能是图中的( )
某学校的一个生物兴趣小组利用星期天采集了如下图所示植物的标本,请你帮他们完成下列问题.
要点提示1)Where did you go over the summer holiday? 2)Who did you go with? 3)How did you go there? 4)What did you do there? 5)How did you feel?