下面的描述中哪些不是防火墙的主要功能（） A.过滤进出网络的数据 B.管理进出网络的

亭外物品摆放原则（）。

A.毛巾、拖把和扫把不得任意放置在收费岛的任何位置，应放置在杂物箱内。

B.在指定位置，选择合理方式来凉晒毛巾和拖把。

C.使用胶水管完毕，收卷起来，并妥当存放。

D.收费亭外不得随意摆放椅子等其它物品，注意保持收费现场的整洁。

其草酸盐不溶于水的是（）

A.小檗碱

B.麻黄碱

C.伪麻黄碱

D.东莨菪碱

E.山莨菪碱

当企业资本结构最佳状态时，应该______

A．资本成本最低化

B．股权收益最大化

C．权益资本最小化

D．财务风险最小化

E．债务资本最小化

Liverpool city council want to clear the city of fat pigeons. They say  that people are feeding the birds, which makes them fat. The pigeons get bigger because their normal diet would consist of seeds and insects, not high-fat junk food they are eating in the city centre.

The council want people to know that everyone who feeds the pigeons is responsible for the streets being so crowded with these birds. They hope to encourage the birds to move away from the city centre and into parks and open spaces.

Ten robotic birds have been brought into the city centre to scare the pigeons away and visitors are asked not to give the pigeons any food. The mechanical birds－known as "robops"－will sit on the roofs of buildings. They can be moved around to different locations. They look like a peregrine falcon, which is a bird that kills pigeons. They even make noises and flap their wings to scare the pigeons. They hope that the pigeons will go away before the city becomes the European Capital of Culture in two years.

73.Pigeons in Liverpool get fat because they eat________.

A. birds      B. seeds     C. insects    D. high-fat junk food

74.What do Liverpool city council try to do?

A. They want the pigeons to move out of the city centre.

B. They want people to feed the pigeons with healthy food.

C. They want people to keep the pigeons at home.

D. They want to keep robotic birds instead of pigeons.

75.The robotic birds are used to________.

A. make the city colorful         B. drive away the pigeons

C. help feed the pigeons          D. show people directions

76.This passage is most probably a(n)________.

A. notice     B. news report     C. short story      D. advertisement

患者女，75岁，突发偏瘫、头痛、头晕10h。既往有高血脂、糖尿病史。MRI表现如下图。

关于脑梗死的MRIDWI演变过程，描述不正确的是（）

A.急性期，DWI高信号，ADC低信号

B.亚急性期，DWI高信号，ADC等信号

C.慢性期，DWI低信号，ADC高信号

D.DWI序列可早在6h内显示病变

E.FLAIR序列较DWI序列敏感