In Paragraph 1, the author introduces the debate between Neptunism and Plutonism by
A. providing information about the backgrounds of both of the geologists involved.
B. describing how scientists studied the planet before the creation of geology.
C. explaining the differences in the formation of sedimentary, igneous, and metamorphic rocks.
D. contrasting modern geologic knowledge with that of previous centuries.
查看答案
According to Paragraph 5, why were most western settlements of the early 1800s located near rivers？
A. Most of the homesteaders who went west traveled by steamboat.
B. This gave them access to the Erie Canal and the ability to ship merchandise to New York.
C. Water routes represented the only means by which goods could be transported reliably.
D. They required large amounts of water in order to grow healthy crops.
What does the professor mean when she says this:
A. She is reminding the students of previous facts.
B. She is disagreeing with the statistics.
C. She is indicating that the example is unimportant.
D. She is expressing uncertainty about the information.
Why did the woman make overhead copies of the slides？
A. She was very nervous about going first.
B. She was afraid that the computer program would fail.
C. She took the man's advice about making them.
D. She wanted to show them to the man.
What does the professor mean when he says this:
A. He plans to give others an opportunity to speak.
B. He is talking too fast and intends to slow down.
C. He needs to correct something that he has said.
D. He wants to talk about that subject later.
微信支付 
支付宝支付