question: Write a question you would see in a school textbook.
answer: The freezing and thawing action of water affects a rock by

question: Write a question you would see in a school textbook.
answer: In the first half of this century, which technology allowed people, for the first time, to work IN the city but live OUTSIDE the city?

question: Write a question you would see in a school textbook.
answer:
In clear weather, a bright light can be seen for a long distance. In conditions of heavy fog, the visibility is greatly reduced. Which of the following explains the reduced visibility?