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The COSPAS-SARSAT 406mhz system was adopted as an element of

题目
单选题
The COSPAS-SARSAT 406mhz system was adopted as an element of the GMDSS by IMO in（）.
A

1982

B

1980

C

1984

D

1988

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相似问题和答案

第1题：


Cyberspace is described by William Gibson as( )

A.a function only legitimate computer operators have
B.a representation of data from the human system
C.an important element stored in the human system
D.an illusion held by the common computer users

答案：D
解析：

第2题：

COSPAS-SARSAT卫星系统中，发射406MHZ信号的信标是（）

  • A、ELT
  • B、EPIRB
  • C、PLB
  • D、A+B+C

正确答案:D

第3题：

You are creating an ASP.NET web application that hosts several Windows Communication Foundation (WCF) services.The services have ASP.NET Compatibility Mode enabled. Users authenticate with the Web application by using a cookie-based ASP.NET Forms Authentication model.You add a service file named Authentication.svc that contains the following code segment:<%@ ServiceHost Service="System.Web.ApplicationServices.AuthenticationService"Factory="System.Web.ApplicationServices.ApplicationServicesHostFactory" %>You need to ensure that users can access the WCF services without having to re-authenticate.Which two configuration settings should you add? (Each is part of a complete solution. Choose two.)（）

A. In the system web. Extensions scripting/webServices/authenticationService element, set the enabled attribute to true.

B. In the system web. Extensions scripting/webServices/profileService element, set the enabled attribute to true.

C. Add a service endpoint with basicHttpBinding for the contract System.Web.ApplicationServices.AuthenticationService.

D. Add a custom service behavior named AuthenticationService Type Behaviors with a service AuthenticationManager element that has service AuthenticationManagerType set to System.Web.Security.SQL Membership Provider


参考答案：A, C

第4题：

A network vulnerability scanner is part of which critical element of network and system security?（）

  • A、host security
  • B、perimeter security
  • C、security monitoring
  • D、policy management

正确答案:C

第5题：

COSPAS-SARSAT系统由（）组成。①Inmarsat卫星；②COSPAS/SARSAT卫星；③Inmarsat卫星和COSPAS/SARSAT卫星；（多地面站和移动站；⑤本地用户终端；．⑥406MHz卫星示位标；⑦任务控制中心；⑧搜救协调中心

  • A、①⑤⑥⑧
  • B、②④⑤⑥
  • C、②⑤⑥⑦
  • D、②⑤⑥⑧

正确答案:C

第6题：

COSPAS-SARSAT系统中，PLB工作在（）频率

  • A、1.6GHZ
  • B、406/1.21.5MHZ
  • C、121.5MHZ
  • D、406MHZ

正确答案:B

第7题：

下面的文件正确吗？为什么？用IE和本章中的解析器验证你的结论。 mes.dtd ＜!ELEMENT message ANY＞ ＜!ELEMENT persion (name,age?,lxfs)＞ ＜!ELEMENT lxfs (#PCDATA,tel|email)*＞ ＜!ELEMENT name (first,last)＞ ＜!ATTLIST name sex (male|female) "male"＞ ＜!ELEMENT first %pc; ＞ ＜!ELEMENT last %pc;＞ ＜!ELEMENT age %pc;＞ ＜!ELEMENT tel %pc;＞ ＜!ELEMENT email %pc;＞ ＜!ENTITY % pc “(#PCDATA)”＞ ＜!ELEMENT emergency EMPTY＞ ＜!ATTLIST emergency fire CDATA #FIXED "119" police CDATA #FIXED "110" hospital CDATA #FIXED "120" ＞ mes.xml ＜?xml version="1.0" encoding="gb2312"?＞ ＜!DOCTYPE SYSTEM "mes.dtd"＞ ＜message＞ ＜persion＞ ＜name sex="男"＞ ＜first＞li＜/first＞ ＜last＞xiao＜/last＞ ＜/name＞ ＜age＞25＜/age＞ ＜lxfs＞ ＜tel＞123456＜/tel＞ ＜/lxfs＞ ＜/persion＞ ＜persion＞ ＜name＞ ＜first＞wang＜/first＞ ＜last＞xiao＜/last＞ ＜/name＞ ＜lxfs＞＜/lxfs＞ ＜/persion＞ ＜emergency fire="120" police="110" /＞ ＜/message＞


正确答案: 不正确。有5处错误，“＜!ELEMENT lxfs (#PCDATA,tel|email)*＞”句“#PCDATA”与“tel”之间应该用“|”，或去掉“#PCDATA”；参数实体应先声明后使用；文档类型声明缺少根元素；“name”的“sex”属性取值错误；“emergency”的“fire”属性取值错误。正确的文件：mes.dtd ＜!ELEMENT message ANY＞
＜!ELEMENT persion (name,age?,lxfs)＞
＜!ELEMENT lxfs (#PCDATA|tel|email)*＞
＜!ELEMENT name (first,last)＞
＜!ATTLIST name sex (male|female) "male"＞
＜!ENTITY % pc "(#PCDATA)"＞
＜!ELEMENT first %pc; ＞
＜!ELEMENT last %pc;＞
＜!ELEMENT age %pc;＞
＜!ELEMENT tel %pc;＞
＜!ELEMENT email %pc;＞
＜!ELEMENT emergency EMPTY＞
＜!ATTLIST emergency
fire CDATA #FIXED "119"
police CDATA #FIXED "110"
hospital CDATA #FIXED "120"
＞
mes.xml
＜?xml version="1.0" encoding="gb2312"?＞
＜!DOCTYPE message SYSTEM "mes.dtd"＞
＜message＞
＜persion＞
＜name sex="male"＞
＜first＞li＜/first＞
＜last＞xiao＜/last＞
＜/name＞
＜age＞25＜/age＞
＜lxfs＞
＜tel＞123456＜/tel＞
＜/lxfs＞
＜/persion＞
＜persion＞
＜name＞
＜first＞wang＜/first＞
＜last＞xiao＜/last＞
＜/name＞
＜lxfs＞＜/lxfs＞
＜/persion＞
＜emergency fire="119" police="110" /＞
＜/message＞

第8题：

A network vulnerability scanner is part of which critical element of network and system security?()

A. host security

B. perimeter security

C. security monitoring

D. policy management


参考答案：C

第9题：

在COSPAS-SARSAT系统中PLB信标工作在（）

  • A、1.6GHZ
  • B、406/121.5MHZ
  • C、121.5MHZ
  • D、406MHZ

正确答案:D

第10题：

单选题
Care and cleanliness are required when installing diesel fuel filters （）.
A

to prevent the fuel system from becoming air-hound

B

to prevent the fuel system becoming clogged with dirty particles

C

both of the above

D

to prevent the lubricating oil from leaking out of the filter element


正确答案： B
解析： 暂无解析

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