期货投机与证券投资的区别在于期货投机主张横向投资多元化,证券投资主张纵向投资分散化。( )
参考答案:错
下列咳嗽不伴杵状指的是()。
A.肺炎
B.肺癌
C.脓胸
D.肺脓肿
E.支气管扩张
A ( )is a software that provides a method of communication between two electronic devices over the World Wide Web.
A. router
B. cober
C. J2EE
D. web service