公安机关消防机构在作出火灾事故认定前，应当召集当事人到场，说明拟认定的（）。A、火灾

下列关于血管母细胞瘤的描述，错误的是（）

A、囊实性肿瘤多见 

B、好发部位为小脑及脊髓 

C、儿童多见P149，大于40岁 

D、可合并Von Hippel-Lindau病 

E、肿瘤实性部分增强明显 

某服务企业本期对外提供运输劳务收入50万元，营业税率3%，同期对外转让一项无形资产收入 20万元，营业税率5%。上述业务涉及营业税的会计处理是( )。

A．主营业务税金及附加2.5万元

B．其他业务支出2.5万元

C．主营业务税金及附加1.5万元，其他业务支出 1万元

D．主营业务税金及附加1.5万元。营业外支出1万元

Movie makers at one time worried that they might be put out of business by television. Recently, however, more and more people have been going to the movies. This may be partly because the economic situation in America has worsened. When at the movies, people forget their troubles, as they get involved in the story on the screen. Also, directors have recently been producing pictures that large numbers of people want to see.

Americans in the millions are returning to their love affair with the movies. Motion picture industry experts see two main factors responsible for this: an increased need by Americans to escape from economic worries and a large number of new movies with broad audience appeal.

Movie makers admit that their rising popularity is partly the result of poor economic conditions, which traditionally bring an increase in theater attendance. “When people are fearful about the future, they look for escape,” comments Jack Valenti, president of the Motion Picture Association of America. “In a shaded theater, with a 65-foot screen, you lose yourself for two and a half hours and people find this beneficial.”

小题1:What did movie makers worry about before?

A．That people preferred watching TV to seeing films.

B．That movies couldn’t be a business any more.

C．That their movies might be played on television.

D．That no one would go to the cinema.小题2:Why are so many people going to see movies now?

A．Because people now have much more money.

B．Because people wanted to escape from real life.

C．Because people have troubles.

D．Because watching movies is now much cheaper than watching TV.小题3:What does the underlined word “worsened” mean in the first paragraph?

A．become attractive

B．become amazing

C．become bad

D．become popular小题4:The main topic of American movies is about          .

A．economy

B．love

C．tradition

D．not mentioned

自行车是人们常用的交通工具．就你平时对自行车的观察，回答下列问．

（1）你认为自行车上面有几种简单机械，并分别说明它们各起到了什么作用．（要求写出2种）

（2）自行车锁由于受到雨淋，不好用了，你有什么办法可以让锁变得好用？并说现其中的物理道理．（要求写出1种）

中间人攻击或IP/MAC Spoofing攻击会导致信息泄露等危害，在内网中比较常见，为了防止中间人攻击或IP/MAC Spoofing攻击，可以采取的方法有（）。

A.配置Trusted/Untrusted接口

B.限制交换机接口上允许学习到的最多MAC地址数目

C.使用DHCP Snooping检查DHCP REQUEST报文中CHADDR字段的功能

D.在交换机上配置DHCP Snooping功能