【文章內(nèi)容簡(jiǎn)介】 who create and then ride their own waves.As with many scientific advances－Isaac Newton’s apple or Benjamin Franklin’s lightning bolt—Dr. Roh’s experiment began with a walk. Passing Caltech’s Millikan Pond in 2016, he observed a bee on the water’s surface producing waves. He wondered how an insect known for flight could push itself through water.Dr. Roh and his coworker, Morteza Gharib, used butterfly nets to collect local Pasadena honeybees and observed their surflike movements. The researchers used a wire to restrict each bee’s bodily movement, allowing close examination of their wings. They found that the bee bends its wings at a 30degree angle, pulling up water and producing a forward force. Bees get trapped on the surface because water is roughly three times heavier than air. But that weight helps to push the bee forward when its wings move quickly up and down. It’s a tough exercise for the bees, which the researchers guess could handle about 10 minutes of the activity.The researchers said the surflike movement hasn’t been documented in other insects and most semiaquatic (半水生的) insects use their legs for pushing power, which is known as waterwalking. It may have developed in bees, they predicted.Dr. Roh and Dr. Gharib have imagined many practical applications for bees’ surfing. One plan is to use their observations to design robots able to travel across sky and sea. “This could be useful for search and rescues, or for getting samples of the surface of the ocean, if you can’t send a boat or helicopter,” Dr. Gharib said.28. What does the author intend to show by mentioning Newton and Franklin?A. Roh’s admiration for them. B. Roh’s chance discovery about bees.B. Their outstanding talent for science. D. Their similar achievements in discovery.29. What plays the most vital role in a bee’s moving forward on water?A. The air weight. B. Its leg extension.C. The water movement. D. Its continuous wing beat.30. What’s the author’s attitude towards using this observation?A. Uncaring. B. Supportive. C. Doubtful. D. Worried.31. What does the text mainly tell us?A. Honeybees can surf to safety. B. Bees help scientists make inventions.C. Insects can adapt to the environment. D. Nature is a helpful guide for discovery.DJapan is an island country in East Asia. Located in the Pacific Ocean, it lies to the east of China, Korea, and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea in the south. It is made up of over 3, 000 islands, the largest of which are Honshu, Hokkaido, Kyushu and Shikoku. Most of Japan39。s islands are mountainous, and many are volcanic, including the highest mountain, Mount Fuji.The characters that make up Japan39。s name mean the sun39。s origin, so Japan is also sometimes known as The Land of the Rising Sun, a name that es from the country39。s eastward position relative to mainland Asia.The climate of Japan varies upon locationit is hot in the south and cool in the north. For example its capital and largest city Tokyo is located in the north and its average August high temperature is 31℃ and its average January low temperature is 2℃. By contrast, Naha, the capital of Okinawa, is located in the southern part of the country and has an average August high temperature of 30℃ and an average January low temperature of 14℃.Its capital and largest city is Tokyo. At 377, 872 square kilometers, Japan is the sixtysecond largest country by area. It has the world39。s 10th largest population, with nearly 128 million people. The Greater Tokyo Area, with over 30 million people, is the largest city area in the world.Japan is the world39。s third largest economy power behind China and is the sixth largest exporter and importer and is a member of the United Nations, G8, G4, and APEC.32. What39。s the first paragraph mainly about?A. Japan39。s mountains. B. Japan39。s largest island.C. Japan39。s location and characteristics. D. Japan39。s neighbours.33. What39。s the temperature difference between the January average of Tokyo and that of Naha?A. 2℃. B. 10℃. C. 12℃. D. 14℃.34. What can we infer form t