How many rows of piles are generally set up in freestyle skating competition? How many piles per row?
A: row 5 and 25
B: rows 2 and 18
C: rows 1 and 30
D: rows 3 and 20
A: row 5 and 25
B: rows 2 and 18
C: rows 1 and 30
D: rows 3 and 20
举一反三
- If it is known that A is a 3×5 matrix, after executing A(:,1:2:3)=[], ( ). A: A becomes row vector B: A becomes 3 rows and 3 columns C: A becomes 3 rows and 2 columns D: A becomes 2 rows and 3 columns
- People_______ on this lake. A: row B: rows C: rowing
- 声明一个10行、每行20个字符的多行文本框区域，以下哪句代码正确？（ ）。 A: <;textarea col=”10” row=”20”>;<;/textarea>; B: <;textarea col=”20” row=”10”>;<;/textarea>; C: <;textarea cols=”10” rows=”20”>;<;/textarea>; D: <;textarea cols=”20” rows=”10”>;<;/textarea>;
- 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
- 假设数据集中“数量”是第5个字段,下面()能得到第3条记录的数量。 A: Ds.Tables[0].Rows[3][4].ToString B: Ds.Tables[0].Rows[2][4].ToString C: Ds.Tables[0].Rows[2][5].ToString D: Ds.Tables[0].Rows[3][5].ToString