It's not polite to speak in public.A. lo

在以O为极点的极坐标系中，直线l的极坐标方程是pcosθ-2=0，直线l与极轴相交于点M，以OM为直径的圆的极坐标方程是______．

经济批量的确定是假设全年的（）相对较稳定。

A.计划和成本

B.需求和成本

C.计划和需求

D.预算和计划

Complete the dialogue with proper words or sentences

A：Hello ! 小题1:_______________________，please?         

B：Hold on，pease。Your call ，Tom

C：Tom speaking 小题2:______________________?

A：Oh，小题3:______________________________.

C：Where did you go？

A：I went toYinchuanwith my parents .

C：小题4:___________________?

A：I like it very much.It’s one of the most beautiful cities in the norhwest of Chian

C：小题5:___________________?

A： Lots of thngs ，such as swimming ，boating，fishing ande riding camels But I think sand sliding is the most interesting

C：Oh，really？ I can’t wait to go there 。

对病毒性脑膜炎确诊最有意义的检查是（）

A.颅脑CT

B.颅脑MRI

C.CSF细胞学检查

D.CSF病毒分离和组织培养

E.EEG检查

涂膜烘干不良是因为烘干温度较低所致。