题目

仔细阅读短文，按要求回答问题。人类的眼睛人类的眼睛很像一架照相机。眼睛与照相机的不同之处是：人的眼睛是通过调节晶状体的弯曲程度，改变晶状体的焦距来获得清晰的      缩小的实像，如图所示；普通照相机是在物距确定的情况下通过改变像距使像变得清晰。由眼睛的调节作用所能看清的最远点，叫远点，正常眼的远点在极远处。眼睛所能看清的最近的点，叫近点，正常眼的近点约在10cm处。眼睛是人体的重要器官，长时间的用眼，比如People living in the UK take quite a few holidays abroad and in this country each year．Choices made about where to go, how to get there and what to do while there can either benefit or harm the environment．        While on holiday        Many of the things you can do to he greener on holiday will be the same things you can do at home—but there arc also sonic extra things too, like avoiding gifts made from endangered plants and animals．Here are some suggestions:        ●Making the most of locally produced food and drink, and local activities and attractions will support people in the area you are visiting and reduce the need for further environmental influence from transport;        ●Switching off any air conditioning, heating and lights will help reduce climate change effect;        ●Save water—some countries suffer from water shortages and saving water can help avoid damage to our natural habitats （栖息地）.     Endangered species （物种）        Some gifts and foods available in some countries can be made from endangered plants or animals．Check before you buy, but if you doubt, avoid animal and plant gifts．More details of the types of products to avoid and illegal trade hotspots can be found on the Souvenir Alert webpage．     Making a positive contribution to the place you are visiting        There are ways in which your holiday can help support local people and the environment;        ●There are many opportunities to volunteer and help with projects that conserve and improve natural habitats;        ●When you are away, or if you are looking for somewhere to visit, you can support projects or attractions which protect wildlife, such as nature reserves and conservation projects． According to the passage, we can ____ to help reduce climate change effect.        A. make good use of water                 B. buy local food and drink        C. save electricity                        D. go around on foot We can infer from the passage that ____．        A. it is not easy for people to travel abroad        B. not everyone can tell an illegal souvenir        C. green holidays have been accepted by people        D. volunteer work is a must for protecting natural habitats The passage is mainly about _________        A. travel dos and don'ts                  B. the harm done to the environment        C. greener choices for holiday             D. tips on protecting endangered species