What does the professor mainly discuss？
A. His plans for research involving moving rocks
B. A difference between two geological forces that cause rocks to move
C. Theories about why desert rocks move
D. Reasons why geologists should study moving rocks
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What does the professor imply about himself when he recounts some life experiences he had
A. He did not consider the consequences of his decisions.
B. He did not plan to become a literature professor.
C. He has always tried to act consistently.
D. He has trusted in himself and his decisions.
What point does the professor make when he mentions a ships path？
A. It is easy for people to lose sight of their true path.
B. Most people are not capable of deciding which path is best for them.
C. The path a person takes can only be seen clearly after the destination has been reached.
D. A person should establish a goal before deciding which path to take.
在滑网溜的路面上制动时最容易使车轮打滑，当出现车轮拖带现象，车辆会出现()
A. 倾翻
B. 倒溜
C. 侧滑
What does Emerson say about the past？
A. It should guide a person"s present actions.
B. It must be examined closely.
C. It is less important than the future.
D. It lacks both clarity and universal truth.
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