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更多“hot 的同类词是（）”相关的问题
You feel cool when you are near a lake or river because ______.
A．the water is cold
B．the earth is hot
C．the water is colder than the earth
D．cool air from the water moves towards the land
Of course, scientists can't answer all of your questions. If we ask, "Why is the ocean full of salty" scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into the cracks. The rain then carries the salt into he earth and into the rivers. The rivers carry the salt into the ocean. But then we ask, "What happens to the salt in the ocean？ The ocean doesn't get more slat every year". Scientists are not sure about the answer to this question.
We know a lot about our world. But there are still many answers that we do not have, and we are curious.
The main idea of this passage is ______.
A．people feel cool when they are near a lake or river
B．scientists can explain everything we want to know
C．scientists can explain many things but not everything
D．the salt in the ocean comes from rocks
As time went on, hot sun and cool rains made the rock split and break to pieces. Sea waves dashed against the rock. In this way, soil and sand came into being.
Nothing lived on the naked soil. And then the wind and birds brought plant seeds, spiders and other little creatures there. Only plants could grow first. Only they, in sunlight, could produce food from the minerals of the soil, water and air. While many animals landed on the island, they could find no food. A spider spun its web in vain, because there were no insects for its web to catch, In sects couldn' t stay until there were plants for them to eat. So plants had to be the pioneer life on this new island.
The passage centers on ______.
A．how an undersea volcano broke out
B．how an island rose up in the sea
C．how soil was formed on a new island
D．how life began on a volcano-produced island
