小明在做“探究凸透镜成像规律”的实验时：

（1）如图所示，让一束平行光正对凸透镜照射，在光屏上接收到一个最小、最亮的光斑，由此可以测出凸透镜的焦距是______cm．

（2）实验中应使烛焰、凸透镜、光屏三者的中心大致在______．

（3）实验过程中，移动光屏始终找不到像．可能因为透镜与蜡烛的距离______10cm所致，应将蜡烛向______（选填“靠近”或“远离”）透镜方向移动，光屏移动适当距离后，才能在光屏上得到烛焰清晰的像．

（4）小明把自己的近视眼镜放在凸透镜和蜡烛之间，发现光屏上的像变得模糊不清，应该向______（选填“靠近”或“远离”）透镜方向移动光屏，可再次得到清晰的像．

单词拼写

Sunday, April 6^th, Sunny

We went to Beijing on ___小题1:___(度假) today. The weather was ___小题2:__（晴朗的）.We__小题3:___（参观） the Great Wall in the morning. It is the ____小题4:__(最长的)in the world. There were many people there. I took quite a few ___小题5:___（照片）of the Great Wall. The guide there was very ___小题6:__（友好的）to us. She told us ___小题7:__（某些）about Beijing. The food in Beijing is very ___小题8:__（美味的). I __小题9:__(真的)like Beijing duck . We ate a lot in a restaurant. I have a good __小题10:__(时间) in Beijing.