2021届新高考英语一轮复习七选五专项训练（2）科教科普类1.根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 We all do it : texting while walking or chatting on the phone while cooking dinner. In todays society,doing just more than one thing at a time seems very common. But research shows that we had better stop multitasking. _ Its slowing you down._ In fact,it will probably take you longer to finish two projects when youre jumping back and forth than it would to finish each one separately. The same is true even of driving: drivers take longer to reach their destinations when chatting on cellphones. In a word, switching between tasks leads to a loss in productivity._ The human brain can handle two complicated tasks without too much trouble. Add a third task,however, and it can cause you to introduce errors whatever youre working on, especially if one or more of your activities involve much critical(批判性的) thinking. Its stressing you out. Researchers found employees who received a steady stream of office email stayed in a high alert(戒备状态) mode with higher heart rates. Its not only the physical act of multitasking that causes stress._ If you do poorly on an exam because you study while watching matches on TV, that can certainly bring a lot of stress. It can be dangerous. Texting or talking on a cellphone while driving is as dangerous as driving drunk._ People who use mobile devices while walking are less likely to look before stepping into a crosswalk. And in one study, one in five teenagers who went to the emergency room after a car accident admitted they were using a smart phone at the time of the accident.A.Youre making mistakes.B.Its the consequences, as well.C.Then how to avoid multitasking?D.Why should you stop multitasking now?E.Multitasking does harm to your critical thinking.F.Not just using a phone while driving puts you at risk.G.Contrary to popular belief, multitasking doesnt save time.2.根据短文内容,从短文后的选项中选出能填人空白处的最佳选项,选项中有两项为多余选项。 Whether youd like to loosen tight muscles, become more flexible, or just keep yourself tom getting injured when you exercise or play sports, stretching is important. With just a few minutes of gentle stretching, you can reduce the pain that comes from tight muscles, improve your posture, and increase your range of motion._With all these benefits, why not give stretching a try?1. Hamstring(脚筋)(or Back-of-the-leg) StretchThe hamstring muscle runs down the back of your upper leg. Tightness in this muscle can lead to serious back pain, so its an important one to stretch._Working one leg at a time, ft your leg and rest the heel on the wall with your leg slightly bent. Gently straighten your leg until you feel a nice stretch. Pause there and wait. Then switch legs.2._Tight shoulder muscles can lead to neck and back pain as well as other problems. Its important to keep these muscles flexible. You can raise straight overhead, then bend the elbow so that your right hand falls behind your head. Using your left hand, gently pull your right elbow toward the centerline of your body. Ideally, you want your right forearm to be straight up and town. Be sure to keep your head and neck straight, and dont let your right arm force the head down or forward in any way._.3. Neck StretchThis is very important for drivers! Stretch your neck one side at a time, beginning with the right. Tip your head to the left._Do not pull hard. The neck is fragile, so you must be gentle with this stretch. Repeat on the opposite side. A. Arm Stretch.B. Shoulder StretchC. Switch arms and repeat.D. Stand about an arms length away from a table.E. Stretching also improves your balance and coordination.F. For a gentle stretch, lie on the floor near a doorway or wall corner. G. And use your left hand to very gently pull your head toward the front of your left shoulder.3.根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Curling(冰壶) is a winter sport played on ice. Therefore, its most popular in northern countries like Canada. Curling is played in the USA by about 15,000 people._Scottish winters were long and there were forms of entertainment. So people began making a sport out of sliding heavy stones on the frozen lakes. The game spread, and in the 1700s curling clubs formed. Then Scottish soldiers brought it to North America._Men, women, and children often compete on the same team, if they can slide a forty-pound stone down the ice! Both teams slide their stones toward the same goal. After all 16 stones have been cast, the team whose stone has slid closest to the goal gets one point._The ice is so smooth and the stone is so heavy that even the smallest misjudgment in a throw can make the stone slide much too far or stop too suddenly. _Water helps the stone slide, but it can also change the stones path.In curling, a broom