题目

如图所示是潜望镜的结构示意图，其中两块平面镜均相对水平面倾角45゜角．潜望镜是利用了光的反射原理．现有一艘军舰位于与平面镜1等高的正前方，则人眼看到军舰所成的像位______（选填序号：“①平面镜1的正上方”、“②与平面镜1等高的正前方”、“③平面镜2的正下方”或“④与平面镜2等高的正前方”）．人眼看到军舰所成的像到潜望镜的距离_________（选填：“大于”、“大于”或“小于”）军舰到潜望镜的距离．Ⅵ.根据短文内容，用方框中的单词或其恰当形式ij空.毎词只用一汝for,give,easy,allow,so ,cool,they,sell,parents,atSome students often smoke cigarettes in their school's washing room. Tang Liang started smoking 1  the age of 14. One day,he knew that Yao Ming,an ambassador (大使) to the Chinese Association on Tobacco ControK 中国控烟协会) ，asked people not to smoke. Yao Ming was Tang's favourite star,2   his words meant a lot to him. He decided to 3  up smoking.According to the Chinese Association on Tobacco Control,about 350 million Chinese smoke. 50 million is teenagers among 4 Sun Ping of Beijing University said ,“When their parents smoke or shops 5 cigarettes to them,teenagers can get cigarettes more 6 . It's very important 7 parents to help their children stop smoking. ”A fifteen-year-old boy called Li Chen from Shanghai said his 8 didn't smoke. Because they thought smoking could make people feel badly ill,they didn't 9 him to play with friends who smoked. Living in such a good family helped kids say no to cigarettes. Some of his smoking classmates once told Li Chen that smoking made boys look 10 ,but he disagreed. He said ,“Smoking is unhealthy and it's not cool at all. Please stop smoking now!”