半支莲是一种（）的草花。A．不喜阳光、不耐干旱 B．喜阳光、耐干旱 C．喜阴湿环境

市场营销环境的微观环境包括（）和（）六大因素。

Emergency line operators must always ________ calm and make sure that they get all the information they need to send help.

A．grow

B．appear

C．become

D．stay

波特认为企业的基本战略有：（）

A、成本领先战略；

B、成本导入战略；

C、标新立异战略；

D、目标集聚战略；

E、市场分级战略

---Could you tell me_________?

---More than a year.

A．how soon will Yangzhou-Taizhou Airport be built

B．how long has Yangzhou-Taizhou Airport been in service

C．how soon Yangzhou-Taizhou Airport will be built

D．how long Yangzhou-Taizhou Airport has been in service

高炉鼓风机发生喘振的原因有哪些？