道氏理论将价格的波动分为超级趋势、主要趋势、次要趋势、短暂趋势四种。（）
参考答案：错
解析：道氏理论将价格的波动分为主要趋势、次要趋势和短暂趋势三种。
--- Are your parents doctors, too?
--- No, they are teachers. of them loves teaching very much.
A．None
B．Both
C．Either
D．Neither
Given the same water depth and line tension，the holding power of a 19 pound/foot wire rope mooring system in comparison to the holding power of a 90 pound/foot chain mooring system will be（）.
A.weaker
B.equal
C.greater
D.indeterminable
