托福听力真题+题目+答案：Nanomaterial Graphene

托福听力真题+题目+答案：Nanomaterial Graphene

托福听力真题题目如下：

1.What is the main purpose of the lecture

A、To describe some problems associated with nanomaterial

B、To explain why new materials are needed for making semiconductors

C、To describe properties of a recently developed nanomaterial

D、To describe experiments that measured the strength of graphene

2、What similarity between graphene and diamond does the professor emphasize

A、Both have a simple atomic pattern.

B、Both are extremely expensive.

C、Both are poorer heat conductors than silicon

D、Both have natural and synthetic versions.

3、Why does the professor mention adhesive tape

A、To give an example of a potential application for graphene

B、To explain how the first sample of graphene was obtained

C、To suggest that nanomaterials are sometimes found in unexpected places

D、To make a point about the flexibility of graphene

。。。。。余下托福听力真题题目及答案省略！

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托福听力真题+题目+答案：Nanomaterial Graphene