题目内容

摩尔气体常数R具有什么量纲?

A. 能量/（温度摩尔）
B. 能量温度/（摩尔）
C. 能量温度-1（摩尔）

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下列对某物质临界点性质的描述,哪一种是错误的?

A. 液相与气相的相界面消失;
B. 汽化热为零:
C. 液相摩尔体积与气体摩尔体积相等;
D. 气、液、固三相共存

Read the passage and complete the following statement by filling in the blanks.1. With the development of science and technology, the world is getting smaller and becoming more like a village. So English has become an __ language.2. Speaking and understanding English can let a person find more job not only in his or her home country, but around the world as well.3. Understanding English is helpful to explore the world and have a better understanding of the countries.4. The way people speak, the words they choose, and the topics under discussion are deeply tied into the of a place.5. If you are going to attend a university in the US, you need to be able to pass a _ proving that you are fluent in English.

Task 2: Listen to the dialogue twice and decide whether the following statements are True (T) or False (F).[音频]（）1. Smith looks unhappy because of the bad weather.（）2. Smith is very good at English.（）3. English is a required course for both Tom and Smith.（）4. Smith can follow the teacher easily in class.（）5. Tom is ready to help Smith with English.

品牌是法律概念，商标是市场概念。

A. 对
B. 错