单项选择题
As you hold a piece of manila line vertically in front of you，the strands run from the lower left to the upper right.Which type of line is this（）.
A.Right-hand laid B.Cable-laid C.Sennet-laid D.Water-laid
单项选择题 An intermediate spring is（）.
单项选择题 A spanner is a（）.
单项选择题 A long splice in a line（）.
