官方真题Official2托福听力Lecture2文本+真题+答案解析

官方真题Official2托福听力Lecture2题目文本

1.What aspect of Manila hemp fibers does the professor mainly discuss in the lecture?

a) Similarities between cotton fibers and manila hemp fibers

b) Various types of manila hemp fibers

c) The economic importance of Manila hemp fibers

d) A use of Manila hemp fibers

2.Why does the professor mention going away for the weekend?

a) To tell the class a joke

b) To apologize for not completing some work

c) To introduce the topic of the lecture

d) To encourage students to ask about her trip

3.What does the professor imply about the name Manila hemp?

a) It is a commercial brand name.

b) Part of the name is inappropriate.

c) The name has recently changed.

d) The name was first used in the 1940's.

4.Why does the professor mention the Golden Gate Bridge?

a) To demonstrate a disadvantage of steel cables

b) To give an example of the creative use of color

c) To show that steel cables are able to resist salt water

d) To give an example of a use of Manila hemp

5.According to the professor, what was the main reason that many ships used Manila hemp ropes instead of steel cables?

a) Manila hemp was cheaper.

b) Manila hemp was easier to produce.

c) Manila hemp is more resistant to salt water.

d) Manila hemp is lighter in weight.

6.According to the lecture, what are two ways to increase the strength or rope made from Manila hemp fibers?

a) Coat the fibers with zinc-based paint

b) Combine the fibers into bundles

c) Soak bundles of fibers in salt water

d) Twist bundles of fibers

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