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英语专业四级听力50篇 16 A Qualified Pilot
The captain of a small ship had to go along a rocky coast, but he was unfamiliar with it, so he tried to find a qualified pilot to guide him. He went ashore in one of the small ports, and a local fisherman pretended that he was a pilot because he nee
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英语专业四级听力50篇 17 Living Things React
You and all organisms live in an environment. An environment is made up of everything that surrounds an organism. It can include the air, the water, the soil, and even other organisms. An organism responds to changes in its environment. When an organ
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英语专业四级听力50篇 18 Flowering Plants
What arc the parts of a flower? Flowers can have male parts and female parts. The female parts make eggs that become seeds. The male parts make pollen. Pollen is a powdery material that is needed by the eggs to make seeds. To make seeds, pollen and e
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英语专业四级听力50篇 19 Finding the Direction and Location
How can you tell which direction? By day, look for the Sun. It is in the east in the morning and the west in the afternoon. At night, use the Big Dipper to help you find the North Star. It would be better to bring a compass because its needle always
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英语专业四级听力50篇 20 Waves
How does light get from the sun to the earth? How does music get from the stage to the audience? They move the same way in waves! Light and sound are forms of energy. All waves carry energy, but they may carry it differently. Light and sound travel t
