The sun heats the earth, ________ we all know.
The sun heats the earth, ________ we all know.
How is the quartz heater different from other types of heaters A: It heats only the objects in a room. B: It is lighter in weight. C: It heats the room quicker. D: It is more common.
How is the quartz heater different from other types of heaters A: It heats only the objects in a room. B: It is lighter in weight. C: It heats the room quicker. D: It is more common.
中国大学MOOC: So more of the outgoing infrared remains in the atmosphere. As a result the atmosphere heats up (8) ________.
中国大学MOOC: So more of the outgoing infrared remains in the atmosphere. As a result the atmosphere heats up (8) ________.
What’s the most popular heating system according to the engineer A: Every room has a heater. B: The Central room has a heater. C: A heat chamber heats air and passes the warm air through ducts and openings into rooms. D: The rooms are installed with blowers or convection.
What’s the most popular heating system according to the engineer A: Every room has a heater. B: The Central room has a heater. C: A heat chamber heats air and passes the warm air through ducts and openings into rooms. D: The rooms are installed with blowers or convection.
Waves are beautiful to look at, but they can destroy ships at sea, as well as houses and buildings near the shore. What causes waves? Most waves are caused by winds blowing over the surface of the water. The sun heats the earth, causing the air to rise and the winds to blow. The winds blow across the sea, pushing little waves into bigger and bigger ones. The size of a wave depends on how strong the wind is, how long it blows, and how large the body of water is. In a small bay(海湾) big waves will never build up. But at sea the wind can build up huge and powerful waves. A rule says that the height of a wave (in meters) will usually be no more than one-tenth of the wind’s speed (in kilometers). In other words, when the wind is blowing 120 kilometers per hour, most waves will be about twelve meters. Of course, some waves may combine to form huge waves that are much higher. In 1933 the United States Navy( 海军) reported the largest measured wave in history. I t rose in the Pacific Ocean to a height of thirty-four meters.
Waves are beautiful to look at, but they can destroy ships at sea, as well as houses and buildings near the shore. What causes waves? Most waves are caused by winds blowing over the surface of the water. The sun heats the earth, causing the air to rise and the winds to blow. The winds blow across the sea, pushing little waves into bigger and bigger ones. The size of a wave depends on how strong the wind is, how long it blows, and how large the body of water is. In a small bay(海湾) big waves will never build up. But at sea the wind can build up huge and powerful waves. A rule says that the height of a wave (in meters) will usually be no more than one-tenth of the wind’s speed (in kilometers). In other words, when the wind is blowing 120 kilometers per hour, most waves will be about twelve meters. Of course, some waves may combine to form huge waves that are much higher. In 1933 the United States Navy( 海军) reported the largest measured wave in history. I t rose in the Pacific Ocean to a height of thirty-four meters.
短文填空，用括号中所给英文单词的适当形式填空或根据汉语提示写出英语单词(必要时注意形式变化)，完成填空(每空不超过两词)。To understand why the Earth is warming up. ##1## (one) of all, we need to understand why it is warm. Our planet ##2## (cover) with atmosphere(大气). Sunlight passes ##3## (通过) the atmosphere and reaches the Earth. The Sun heats up the ##4## (Earth) surface. When the heat rises into the air, it is stopped by some special gases in the atmosphere like CO2, the ##5## (hot) returns to the Earth and keeps it ##6## (warm) .Power stations and cars release (释放) so ##7## (much) greenhouse gases every day. So we can help stop global (全球的) warming by using less electric things such as ##8## (关掉) lights when we leave a room, or asking our parents to turn down the heating in our house ##9## (save) energy. We can also stop global warming by finding other ##10## (way) of transportation. For example, ride a bicycle or walk instead of going by car. Another way to help stop global warming is to plant and care for trees. Because trees take in CO2, they are our best friends when fighting against global warming.
短文填空，用括号中所给英文单词的适当形式填空或根据汉语提示写出英语单词(必要时注意形式变化)，完成填空(每空不超过两词)。To understand why the Earth is warming up. ##1## (one) of all, we need to understand why it is warm. Our planet ##2## (cover) with atmosphere(大气). Sunlight passes ##3## (通过) the atmosphere and reaches the Earth. The Sun heats up the ##4## (Earth) surface. When the heat rises into the air, it is stopped by some special gases in the atmosphere like CO2, the ##5## (hot) returns to the Earth and keeps it ##6## (warm) .Power stations and cars release (释放) so ##7## (much) greenhouse gases every day. So we can help stop global (全球的) warming by using less electric things such as ##8## (关掉) lights when we leave a room, or asking our parents to turn down the heating in our house ##9## (save) energy. We can also stop global warming by finding other ##10## (way) of transportation. For example, ride a bicycle or walk instead of going by car. Another way to help stop global warming is to plant and care for trees. Because trees take in CO2, they are our best friends when fighting against global warming.