2017-6-16 Purification Technology Edition Daily Question
Thread Content
1. Which of the following is correct regarding the concept of temperature? ( ) (A) Temperature is a fundamental physical property of matter, and it does not change regardless of changes in the external environment. (B) For different substances, the amount of heat absorbed or released when the temperature increases or decreases by one degree is the same. (C) When a substance exchanges heat with its surroundings, its temperature must change. (D) In temperature unit conversions, 0 ℃ = 273.15 K. 2. Which of the following statements about welded steel pipes is correct? ( ) (A) Welded steel pipes are suitable for high-temperature media. (B) Welded steel pipes are suitable for high-pressure media such as high-pressure steam. (C) Welded steel pipes are suitable for corrosive materials. (D) Welded steel pipes are not suitable for high-temperature and high-pressure media. DD Note: Answers to this question must be submitted within three days! ! !
1. In the concept of temperature, the correct answer is (D). (A) Temperature is a fundamental physical property of matter, and it does not change regardless of changes in the external environment. (B) For different substances, the amount of heat absorbed or released when the temperature increases or decreases by one degree is the same. (C) When a substance exchanges heat with its surroundings, its temperature must change. (D) In temperature unit conversions, 0 ℃ = 273.15 K. 2. The correct description of a welded steel pipe is (D). (A) Welded steel pipes are suitable for high-temperature media. (B) Welded steel pipes are suitable for high-pressure media such as high-pressure steam. (C) Welded steel pipes are suitable for corrosive materials. (D) Welded steel pipes are not suitable for high-temperature and high-pressure media
D------------D