Capillary
columns are open tubular columns constructed from which of the
following materials? ( )
A: Glass
B: Metal
C: Stainless
steel
D: Fused
silica
columns are open tubular columns constructed from which of the
following materials? ( )
A: Glass
B: Metal
C: Stainless
steel
D: Fused
silica
举一反三
- Which of the following are the types of columns encountered in gas chromatography?(1) flat plates (2) packed columns (3) plastic strips (4) open tubular, or capillary columns A: 1,2 B: 3, 4 C: 1, 3 D: 2,4
- Which of the following is a steel structure building? (There is only one correct answer to this question) A: The building, beams and columns are reinforced concrete, the roof and walls are profiled steel plate B: The building, beams and columns are hot rolled steel, walls are masonry block C: The building, beams and columns are timber, walls are masonry block D: The building, beams and columns are bamboo, walls are masonry block
- The most expensive glass is . A: Soda-lime B: Borosilicate glass C: Lead-alkali silica glass D: Fused silica glass
- According<br/>to the ratio between composite materials and structural weight, which<br/>of the following used most composite materials? ____. A: F-22 B: A380 C: A400M D: B787
- Owners'<br/>equity in a business increases as a result of which of the<br/>following? () A: Payments<br/>of cash to the owners. B: Losses<br/>from unprofitable operation of the business. C: Earnings<br/>from profitable operation of the business. D: Borrowing<br/>from a commercial bank.