四川省绵阳市2020高考英语 阅读理解三月天天练（2）

绵阳市2020高考英语阅读理解三月天天练（2）及答案When it comes to your skin, there is an important fact that you must keep in mind: Your skin is the largest organ of your body. As an obvious result, skin health and maintenance(保养) is vital. Your skin does everything from protecting you from the elements to assisting you with breathing. Your skin keeps your body hydrated (含水的) and regulates your bodys temperature. In the end, this really is only the beginning of all of the various vital functions that your skin provides to you.Despite the extreme importance of a persons skin, the reality is that many people simply do not pay much attention to issues relating to the health of their skin. With that in mind, there are some prime tips and pointers that you must always keep in mind when it comes to the health and protection of your skin.Protection against harmful rays from the sun is one of the most important steps that you need to take. With this in mind it is vitally important that you make certain you use solid protection when you go out into the sun.Your diet also has a direct effect on the health of your skin. The most important aspect of your diet in relation to the health of your skin is to make certain that you eat a proper amount of food items that contain the proteins and nutrients necessary for your skins health.Water is also important to the health of your skin. While you certainly have heard it before, it actually is true that you should drink at least eight 8-ounce glasses of fresh and pure water every day to keep healthy skin.Finally, when it comes to the health of your skin today and into the future you should avoid smoking all together. In addition, you should drink alcohol only in moderation. Both smoking and too much alcohol consumption can negatively affect the health of your skin in significant ways.64. The underlined word “elements” in the first paragraph probably refers to _.A. bad weatherB. a favorable environmentC. all the chemicalsD. the cells making up the skin65. The writer lists some of the functions of skin in the beginning part to _.A. make an analysis of the main topic of the passageB. draw readers attention to the main topic of the passageC. give a brief introduction to the main topic of the passageD. give the readers a summary of the main topic of the passage66. Which of the following does not help maintain the health of skin?A. Drinking heavy alcohol.B. Taking proper diet in ones life.C. Using solid protection when exposed to the sun.D. Drinking enough fresh and pure water every day.67. Which of the following might be the most proper title of the above passage?A. An essential organ of our body.B. Tips for soft and smooth skin.C. Habits and skin health.D. How to keep our skin healthy.参考答案 6467、AB A D*结束It is hard to go after the blue whale, the oceans largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and sightings with bare eyes are too unreliable to give real insight into its behavior.So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navys formerly top-secret system of underwater detecting（探测）devices across the oceans.Tracking whales is but one example of an exciting new world just opening to civilian（平民的）scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential（潜在的）enemies.Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption（爆发）for the first time and that they plan similar studies.Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures.The speed of sound in water is roughly one mile a second slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope（听诊器）does when it carries faint noises from a patients chest to a doctors ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.51.The passage is chiefly about _.A）an effort to protect an endangered sea speciesB）the civilian use of a military systemC）the introduction of a U.S. Navy top-secret weaponD）a new way to look into the behavior of blue whales52.The underwater listening system was originally designed _.A）to detect and locate enemy boatsB）to monitor deep-sea volcanic eruptionsC）to study the movement of ocean currentsD）to replace the global radio communications network53.What is the closest meaning of the underlined word “to track” in the second paragraph?A）to study B）to fight againstC）to followD）to try to kill54.It can be inferred from the passage that _.A）new radio devices should be developed for tracking the endangered blue whalesB）blue whales are no longer endangered with the use of the new listening systemC）opinions differ as to whether civilian scientists should be allowed to use military technologyD）military technology has great potential uses outsides the military forces55.Which of the following is true about the U.S. Navy underwater listening network?A）It is now partly accessible to civilian scientists.B）It has been replaced by a more advanced system.C）It became useless to the military after the cold war.D）It is a must in protecting endangered species.参考答案51-55 BACDA*结束DJapanese doctors have used thin sheets of tissue from peoples cheeks to repair damaged corneas (角膜). A team from Osaka University transplanted thin layers of cheek cells onto the eyes of four patients with a rare and painful eye condition, reports BBC online. Patients whose vision had been cloudy could see well afterwards, and the “new corneas” remained clear more than a year after the operation.Doctors can also take cells from a healthy eye and grow them in a dish to produce a new cornea, or they can transplant corneas from donors. But these techniques may not work when both eyes are too badly damaged by accident or disease.The team hopes their work may help solve the problem and lead to other types of grow-your-own tissue transplants. The cornea is the clear layer of cells on the surface of the eye. It can be damaged by trauma (外伤) or by a range of diseases.The team worked with four patients who had a painful condition that caused cloudy corneas and dry eyes. Often the eye can regenerate cornea cells but none of the four patients had this ability. The researchers took a 3 mm-wide square of tissue from inside the mouth (cheeks) and grew it into a thin layer in the lab. They used a special low-temperature technique to separate a very thin sheet off each batch (组). They then laid that onto the patients eye. The cell layers stuck onto the eye and developed into tissue that looked and acted like a healthy cornea.However, long-term follow-up and experience with a large series of patients are needed to assess the benefits and risks of this method. “Yet, it does offer the potential of treating severe eye diseases that are resistant to standard approaches,” said the head of the research, Kohji Nishida.68. Now doctors can repair the damaged corneas with the following met