Many different activities or processes cause fungal spores to enter the air. Once in the air, gravity causes the spores to begin to fall and the spore cloud gradually disappears. Understanding how spore clouds are generated and their fate in the air is important for designing investigative ...
D. Wind and clouds.( A )17. A balloon can lift people up with. A. hot air B. soft wind C. smell D. taste( B ) 18. What do we need to breathe and survive? A. Water. B.Air. C. Food. D. Drink.( D )19. What does the poem mainly (主要地) try to tell us? A. We ...
smell D.taste()9.can keep us alive. A.Wind B.Air C. Clouds D. Soft winc()10. What does the poem mainly (主要 ) try to tell us? A. We need air sometimes. B. It's hard to stay in the air. C. Air is too little to waste. D. Air is ve ...
Clouds are made of millions of very small drops of water. The drops move around all the time. When they hit each other they join up. This is how they grow larger and heavier. When they are too heavy to stay in the air they fall down as rain. If it is very cold the very small ...
(2)What does the underlined"They" refer to(指的是)? CA. Wind and airB. Smell and tasteC. A kite and a planeD. Wind and clouds(3)A balloon can lift people up with A?A. hot airB. soft windC. smellD. taste(4)What do we need to breathe and survive...
How Do Clouds Form?The sky can be full of water.But most of the time you can't see the water near the ground.It is usually in the form of water vapor and it is too small to see.When warm air goes higher in the sky,it gets large and cools down.Cool air can't hold as much ...
C.A kite and a plane. D.Wind and clouds. 38.A balloon can lift people up withA. A.hot air B.soft wind C.smell D.taste 39.What does the poem mainly(主要地) try to tell us?D A.We need air sometimes. B.It's hard to stay in the air. ...
Please stay at home if you’re sick The common cold is an infectious disease. We do not recommend flying when you are ill due to the risk of pressure-related injuries, and it is not advisable to travel with respiratory infection symptoms. ...
Sad, blue, the future's not too clear And birds fly backwards Clouds tower, I have nothing to fear And birds fly backwards Packed bags in the hallway Where we used to play all day We're hitting the road that Takes us back again To the same old world we left Wind Through The Trees...
British people are famous for talking about the weather. Do you know why?众所周知，英国人总是讨论天气。你知道为什么吗？It's because in the UK we have a lot of weather.You never know what the weather will be like.这是因为在英国，我们的天气变幻莫测。你永远不知道天气会变成什么样。You can...