可以反映证券组合期望收益水平和多因素风险水平之间均衡关系的模型是( )。 A．证券

新生儿胎粪吸入综合征可能出现哪些并发症（）

A.肺部感染

B.持续肺动脉高压

C.气胸

D.肺出血

E.颅高压

为幼儿提供丰富的语言环境，使他们想说、爱说、能说并（）。对其语言的发展是非常有利的。

A、掌握一定的语言技能

B、掌握阅读和书写的技能

C、有良好的学习习惯

D、能够得到积极的应答

中国法定节日有哪些？

交流电压变送器没有采用线性补偿电路。

Man: It seems the restaurants here have little business these days. Woman:That’s true. But ours is a scenic resort. And this is not the busy season. When summer comes, you’ll see armies of tourists waiting in line in order to get a seat. Question:What do we learn from the conversation about the restaurants in the town

A．They stay closed until summer comes.

B．They cater chiefly to tourists.

C．They are busy all the year around.

D．They provide quality service to their customers.