Read the passage and match the following two columns.

What are the features of columns?（ ） A: Columns are usually characterized by fixed names and locations. B: Columns are printed pages where manuscripts of certain contents are published. C: Columns are relatively independent in the overall layout of newspapers and periodicals. D: Articles in columns are of various styles.

The line chart is a simple form of graphic representation, in which data are arranged in rows and columns. ( )

textread can not support different types of data in different columns. A: 正确 B: 错误

中国大学MOOC: textread can not support different types of data in different columns.

If a is known to be a 2×3 matrix, then after executing a=a(:), ( ). A: a transforms to a column vector B: a transforms to 3 rows and 2 columns C: a transforms to 3 rows and 3 columns D: a transforms to 2 rows 3 and columns

经贸英语Unit 4 Understand the passage. Read the passage and match the following two columns.

MDM2 and p53 fusion proteins were generated _____ Escherichia coli, and then purified _____ Ni-NTA Superflow Columns.

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

The Greek orders of columns are used including