题型:阅读理解 题类:常考题 难易度:普通
安徽省黄山市屯溪第一中学2019-2020学年高一上学期英语10月月考试卷
Teenagers who talk on the cell phone a lot, and hold their phones up to their right ears, score worse on one type of memory test. That's the finding of a new study. That memory impairment might be one side effect of the radiation (放射线) that phones use to keep us connected while we're on the go.
Nearly 700 Swiss teens took part in a test of figural memory. This type helps us remember abstract (抽象的) symbols and shapes, explains Milena Foerster. The teens took memory tests twice, one year apart. Each time, they had one minute to remember 13 pairs of abstract shapes. Then they were shown one item from each pair and asked to match it with one of the five choices. The study volunteers also took a test of verbal memory. That's the ability to remember words. The two memory tests are part of an intelligence test. The researchers also surveyed the teens on how they use cell phones. And they got call records from phone companies. The researchers used those records to figure out how long the teens were using their phones. This allowed the researchers to work out how big a radiation exposure (接触) each person could have got while talking.
A phone user's exposure to the radiation can differ widely. Some teens talk on their phones more than others. People also hold their phones differently. If the phone is close to the ear, more radiation may enter the body, Foerster notes. Even the type of network signal that a phone uses can matter. Much of Switzerland was using an older "second-generation" type of cell phone networks, the study reports. Many phone carriers (通讯公司) have moved away from such networks. And more companies plan to update their networks within the next few years.
The teens' scores in the figural memory tests were roughly the same from one year to the next. But those who normally held their phones near the right ears, and who were also exposed to higher levels of radiation, scored a little bit worse after a year. No group of teens showed big changes on the verbal memory test. Why might one type of memory be linked to cell phone use, but not another? Foerster thinks it could have to do with where different memory centers sit in the brain. The site that deals with the ability to remember shapes is near the right ear.
A
Safety and Security Procedures
Your safety and the security of your personal property(财产) are of the primary concern to those of us who welcome you as our guest. We urge you to take advantage of the following suggestions.
YOUR VEHICLE Lock your vehicle and do not leave money or valuable items inside. We are not responsible for their loss. |
TRAVELING Be good at noticing things around you when sightseeing or traveling. Stay in heavily traveled areas. Don't display large amounts of cash. |
GUEST ROOM SECURITY For additional security, use the deadbolt (插锁) provided on your door and make sure the windows are locked. As an additional precautious measure, please secure the secondary locks provided. Do not admit anyone to your room without first making identification. A one-way viewer is provided in your door to assist with identification. If there is any doubt about the person's identity, please contact the Front Desk. |
SAFETY BOXES Do not leave money or valuables in your room or vehicle. We provide free safety boxes for you. We are not responsible for items left in room valued over $200. |
KEYS Safeguard your key. Please do not leave it in the door. Do not give your key to others or leave it unattended. Please leave your key at the Front Desk when you check out. |
FIRE Please familiarize yourself with the nearest fire exits. Report fire or smoke to the hotel operator. In the unlikely event of a fire, please move quickly and calmly to the nearest safe exit and leave the building. Avoid the use of the elevator. |
REPORTING Please report any suspicious activity, or safety concerns to management. |
试题篮