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.
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.
举一反三
- The new type of advertisement in the classified columns of newspapers ________.
- 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
- 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
- 下列MySQL命令正确的是( ) A: show databases; B: show tables; C: show columns; D: show columns from customers;
- 下列正确的命令是（ ） A: show tables; B: show columns; C: show columns from 表名; D: show databases;