Clouds form形成云。Lots of water droplets join together to make bigger drops很多的水滴聚集在一起形成更大的水滴。Rain falls, filling rivers雨落下,填进河流里。The rivers run to the sea, and the cycle starts again河流汇入海洋,循环又重新开始。正确的顺序是④①②③⑤。故选C。
It's a cloudy day. What makes the clouds form? A. Water evaporates and condenses. B. The sun is very hot. C. The wind stops blowing. D. The air is dry. 相关知识点: 试题来源: 解析 A。解析:云是由水蒸发后凝结形成的。选项 B 太阳很热不是云形成的直接原因。选项 C 风停止吹不是...
Stratus clouds are low clouds. They cover the sky like bed sheets. 4. Most of the water in clouds is in very small droplets. The droplets are so light they float (漂浮) in the air. Sometimes those droplets join with other droplets. Then they turn into larger drops. When that happens...
When that happens, gravity(重力)causes them to fall to the earth. We call the fallingwater drops “rain".Why do Scientists Study Clouds?Clouds are important for many reasons. Rain and snoware two of those reasons. At night, clouds reflect(反射)heat and keep the ground warmer. During the ...
What Are Clouds?A cloud is made of water drops or ice floating in the sky. 【小题1】 Clouds are an important part of Earth’s weather. How Do Clouds Form? The sky can be full of water. But most of the time you can’t see the water. 【小题2】 They have turned into water ...
When that happens, gravity (重力) causes them to fall the Earth. We call the falling water drops “rain”. When the air is colder, the water may form snowflakes instead. Freezing rain, sleet or even hail can fall from clouds.Clouds are important for many reasons. Rain and snow are two...
When that happens, gravity (重力) causes them to fall onto the Earth. We call the falling water drops "rain". When the air is colder, the water may form snowflakes instead. Some snows are so heavy that they fall from clouds. Why are clouds so important for humans? Rain and snow are...
9.According to paragraph 5, what happens when temperatures rise above 374°C? A. Atmospheric pressure begins to decrease. B. Water vapor disappears from the atmosphere. C. Water evaporates regardless of atmospheric pressure. D. More energy is required to evaporate a given volume of water. 你...
The temperature difference between the ocean and the air C. The movement of ocean currents D. The fish in the ocean 相关知识点: 试题来源: 解析 B。解析:当海水蒸发形成云,主要原因是海洋和空气之间的温差。海水中的盐不是形成云的主要原因,A选项错误。洋流运动主要影响海水的热量分布等,但不是蒸发...
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