镜头的光学特性是指由其光学机构所形成的的物理性能，由 、 、 三个因素组成。
填空题 2020-06-04 09:50:06
0341 感兴趣题目
数字高清晰度电视摄像机与普通清晰度十字电视摄像机最主要的区别在于 。
昏迷量表评估法昏迷的救治原则昏迷患者基础护理上消化道出血临床常见的病因急性上消化道出血 Hi, Xiaoyan, You want to know about my gym. The gym is “New You”. The phone number is 020 791 1340. It's near Oxford Circus. There is a swimming pool and there are a lot of classes. There is a yoga class on Tuesday morning and there are aerobics classes every evening. There is also a Tai Chi class, on Wednesday and Saturday afternoon between 2:00 and 3:00. There are lots of running machines and weights machines, but there aren't any bicycles. There's a sauna, but there isn't a steam room and there are very nice showers and free cosmetics! The best time to come is in the evening,because there are a lot of trainers to help you. There are different ways to pay for the classes. You can pay by cash, credit card or cheque. See you there? Jane1. When can you go to aerobics class in" New You "? A. On Monday morning. B. On Saturday evening.C. Every day in the daytime.2. When does the Tai Chi class start? A. On Wednesday.B. On Saturday afternoon.C. At 2:00 p.m. on Wednesday and Saturday. 3. What is free in the gym? A. Steam room.B. Cosmetics. C. Sauna.4. Why is it best to come in the evenings? A. Because there are a lot of trainers to help you.B. Because there are less people.C. Because there are more classes.5. How can you pay for the class? A. Only by cheque. B. Free charge. C. By credit card or cash. Meetings are very common nowadays. They can be weekly, monthly or annually. Some people think most meetings feel like a waste of time. They seem pointless and boring at times. Then how do you run an effective meeting? First, assign roles, such as greeter, timekeeper and note taker, so that you, the organizer, can be free to lead discussions and presentations. Next, take charge from the start. Everyone will listen to you and join your discussion if you take charge in every aspect of the meeting. Show everyone that you really know what you are talking about, and everything that you talk about is useful. Most important of all, follow the agenda. At the end of the meeting, spend a little extra time for the participants to discuss anything that needs to be immediately discussed but which may not have been on the agenda. Always ask the participants questions so that they can speak their minds and keep them interested. Remember that a good meeting is a two-way communication. Be open to everyone's opinion, ideas, and suggestions. Don't forget to thank them for the ideas they present. And finally, close the meeting with everyone knowing what is expected of them and what they should do for the following weeks. Then, send out meeting minutes within a few days, while everyone still remembers the points.1. A successful meeting should have different people to play different roles. 2. Generally people only discuss the items listed on the agenda in a successful meeting. 3. An unsuccessful meeting might be full of single-way communication. 4. When the meeting is closed, it means there is nothing to do in the following weeks. 5. Minutes should be sent out to the participants within a month after the end of the meeting. Elizabeth Blackwell was born in England in 1821, and moved to New York City when she was ten years old. One day she decided that she wanted to become a doctor. That was nearly impossible for a woman in the middle of the nineteenth century. After writing many letters asking for admission（录取） to medical schools, she was finally accepted by a doctor in Philadelphia. She was so determined that she taught school and gave music lessons to get money for the cost of schooling. In 1849, after graduation from medical school, she decided to further her education in Paris. She wanted to be a surgeon（外科医师）,but a serious eye problem forced her to give up the idea. Upon returning to the United States, she found it difficult to start her own practice because she was a woman. By 1857 Elizabeth and her sister, also a doctor, along with another woman doctor, managed to open a new hospital, the first for women and children. Besides being the first woman physician and founding her own hospital, she also set up the first medical school for women.1. Why couldn't Elizabeth Blackwell realize her dream of becoming a surgeon? A. She couldn’t get admitted to medical school.B. She decided to further her education in Paris.C. A serious eye problem stopped her.2. What main obstacle（障碍） almost destroyed Elizabeth’s chances for becoming for a doctor? A. She was a woman.B. She wrote too many letters.C. She couldn’t graduate from medical school.3. How many years passed between her graduation from medical school and the opening of her hospital? A. Eight years. B. Ten years. C. Nineteen years. 4. According to the passage, all of the following are" firsts " in the life of Elizabeth Blackwell, except that she .A. became the first woman physicianB. and several other women founded the first hospital for women and childrenC. set up the first medical school for women5. Elizabeth Blackwell spent most of her life in .A. England B. Paris C. the United StatesHi, Joe, How are you? I'm sitting on the balcony of my hotel. I am looking at Hyde Park in London and I am thinking about my life here. I am having a wonderful time. I like my job—it is very interesting, and my colleagues are great. I love London—it's busy, noisy, crowded and exciting. The cinemas, theatres, pubs and restaurants are really nice, but they're too expensive! I think the people in London are very friendly (surprise!) and I've got some new friends. What is the weather like in Shanghai? Is it raining? Here it's lovely! It isn't foggy! The sun is shining and the birds are singing. It's very warm. And it is my birthday today. But I am missing you all in Shanghai. COME AND VISIT! Love, Xiaoyan1. What does Xiaoyan stay in London for? A. She is having a holiday. B. She is working.C. She is visiting some of her colleagues.2. What are Xiaoyan's London colleagues like? A. They are very important. B. They are very serious. C. They are very nice.3. What does Xiaoyan think of London? A. She thinks it is relaxed. B. She thinks it is cheap.C. She thinks it is exciting.4. What does Xiaoyan think of people in London? A. She thinks they are interesting. B. She thinks they are friendly.C. She thinks they are surprising.5. What's the weather like in London when Xiaoyan is writing this letter? A. It is warm.B. It is foggy.C. It is cloudy. In Britain, people usually have a doctor near their home or in their town. This is the local doctor. You have to register with a doctor before you can make an appointment. You usually have to fill in a form and the doctor examines you. Families often all register with the same doctor. Doctors often work together in groups, and the name of the place where they work is a Doctor’s Surgery. The government pays for this system, and it is free to go to see your doctor. If the doctor decides that you need treatment he can prescribe medicine. For example,he can prescribe antibiotics for an infection. Medicine can be tablets to take with water or liquid to drink. The doctor writes the prescription. You take the prescription to the chemist's, and the chemist will make up the medicine for you. You usually have to pay some money for the medicine—but you don’t have to pay the full price.1. British people usually go a long way to see a doctor. 2. British families often register with the same doctor. 3. Doctors always work alone in their own Doctor's Surgery. 4. British people don't have to pay when they see their doctor. 5. British people usually have to pay for their prescription at the chemist's. 从以下A、B、C三个选项中选出与英文最适合的中文翻译。1. We shall be flying to South America this time next month. A. 下个月的今天我们将乘飞机去往南美洲。B. 下个月的今天之前我们将乘飞机去往南美洲。C. 下个月我们应该乘飞机去南美洲。2. I want to know when he is leaving for New York tomorrow. A. 我想知道他明天什么时候离开纽约。B. 我想知道他明天什么时候正在去纽约。C. 我想知道他明天什么时候动身去纽约。3. Will this be a one-way trip? A. 您是一个人旅行吗？B. 您的旅行是一条线路吗？C. 您是单程旅行吗？4. Thanks to our hard work, we can fulfill the task on time. A. 感谢我们努力工作才能及时完成任务。B. 由于我们努力工作，当时才能完成任务。C. 由于我们努力工作，才能按时完成任务。5. At last the Englishman got angry with the visitor though he tried not to show it. A. 最后英国人生游客的气了，所以他假装累了不带他参观。B. 最后英国人已很讨厌这位游客，但他尽力不表现出来。C. 最后英国人很生这位游客的气了，尽管他累得没力气表现出来了。 
