题目

近期流行的“自拍神器”给旅行者自拍带来方便．如图所示，与直接拿手机自拍相比，利用自拍杆可以   物距，减小人像的大小，从而   取景范围，取得更好的拍摄效果．（均选填“增大”或“减小”）   答案：【答案】增大；增大【解析】解：根据凸透镜成实像时，物距越大，像距越小，像越小，可知“自拍神器”与直接拿手机自拍相比，利用自拍杆可以增大物距，减小人像的大小，从而增大取景范围，取得更好的拍摄效果． 故答案为：增大；增大．“自拍神器”是利用凸透镜成倒立、缩小的实像工作的，阅读下面短文,在空白处按要求填入适当的单词或括号内单词的正确形式。每空1个单词。I’m Lin Tao from China. Spring Festival is very important in my country. Like Christmas, it【1】 (happen) every year, but not on the same day. It usually comes in February,【2】 (连词) sometimes it comes in January. I’ve got some photos of it. Have a look at【3】(they).Here is【4】 (冠词) first one. It’s a few days before Spring Festival. My mother is cleaning our house and 【5】 (sweep) away bad luck. Look at the food on the table! We always buy a lot of food before the festival.Oh, I love this photo. We are【6】(celebrate) Spring Festival with a traditional family Dinner【7】 (介词) the evening before Spring Festival. There’s so much delicious food. I am eating jiaozi-a kind of dumping. After the dinner, we【8】 (usual) watch a special programme on TV.In this photo, my parents and I are visiting my uncles and【9】(aunt). We are wearing new sweaters and coats. I always get a hongbao. It【10】 (mean) lucky money.