什么叫calls和 puts?

什么叫calls和 puts? puts and calls 芝加哥期货中Calls和Puts是啥意思?还有哪里可以看到芝加哥黄金空头和多头持仓量, short calls和long puts分别怎么理解?不明白为什么long puts要理解成买家有权在特定时间卖给卖家option contract.到底是买家还是卖家啊? puts什么意思 puts什么意思 calls This is your sweater.please _______.A.puts on it B.puts it on C.put it onPut it on和Put on it,有什么区别, 是he is puts on还是he is put on?wear是动词么?he is put on和he puts on有什么区别 he is put on和he puts on有什么区别 she dresses herself和she puts clothes herself有什么区别啊! puts on和put on的区别 问个英文的问题 put off和puts off有什么区别吗?同样take off和taked问个英文的问题put off和puts off有什么区别吗?同样take off和taked off make phone calls to sb.和make a phone call to sb.这两者有什么区别 是个什么结构呢?What the caterpillar calls the end,the butterfly calls the beginning. whoever引导的状语从句No matter who calls,I will come是否和Whoever calls,I will come.意思一样啊 Whoever有什么情况是不能用的吗 明确告诉我可以或者是不可以 什么叫~叫兽和砖家? He puts some bread in the bag and 什么out