Unit3 Electricity 单元话题短文首字母填空练习（含解析）

Unit 3 Electricity 单元话题短文首字母填空 Read the passage and fill in the blanks with proper words（在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给） Electricity has always been around although it’s invisible! Scientists have worked with electricity for thousands of years. We’ve all heard of the famous ones such a 1 Benjamin Franklin and Thomas Edison, but many other important inventors have been buried (埋葬) in history. Back in ancient Greece, scientists began to study electricity. Over 2,000 years l 2 in 1600, English scientist William Gilbert first used the word “electric” in a report. In 1786, an Italian professor found that when he touched a dead frog’s leg with a knife, the leg started to shake! In 1792, a 3 Italian scientist, Alessandro Volta, gave the correct e 4 : the two different metals—the steel knife and the tin (锡) plate where the frog was lying—made the leg shake. Volta also invented the first battery. In the late 19th century, British scientist Joseph Swan and American inventor Thomas Edison set up a company to p 5 the first electric lamp. Before that, Edison invented a generator (发电机) and used it to provide e 6 to light his lab. Later he lighted the first New York street with electric lamps in September 1882! When Edison’s generator was c 7 to James Watt’s steam engine (蒸汽机), it became possible to produce a lot of electricity at last! Water Park Safety Water parks can be a lot of fun for kids, as long as you keep safety in mind. Before you go, make sure the park is monitored by qualified (有资质的) lifeguards. Once there, read all posted s 8 before letting your child on any rides (many rides have age, height, weight, or health requirements, and each has a different depth of water). Teach your kids to follow all rules and directions, such as walking i 9 of running and always going down the water slide in the right position—feet first and face up. A Coast-Guard approved life jacket is a good idea, too. Know which rides are appropriate for your child’s a 10 and development. For example, wave pools can quickly go from calm to rough, putting even a good swimmer in over his or her head. Younger children can be f 11 by older kids’ splashing and roughhousing. What to Do in an Emergency Whenever a child is missing, always check the pool first. Survival d 12 on a quick rescue and restarting breathing as soon as possible. If you find a child in the water, immediately get the child out while calling 1 13 for help. If someone else is around you, have them call 911. CPR should be b 14 done by someone who is trained in CPR. When the emergency number is called, follow the instructions the emergency operators provide. If you think the child may have suffered a neck injury, such as with diving, then keep the child on his or her back and brace the neck and shoulders with your hands and forearms to help keep the neck immobilized, until emergency help arrives. Don’t let the child move. Speak in calm tones to ... ...