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【单选题】

Which of the following devices will allow a technician to measure the amount of data that is capable of traversing the network?（）

A、Event logs

B、Throughput tester

C、Packet sniffers

D、OTDR

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第1题
[单选题] The UI is not being updated when the Data property is set. You need to ensure that the DisplayData class correctly updates the UI when the Data .. What should you do ?（）

A、Insert the followiing code at line 14 NotifyPropertyChanged("Data");  B、Insert the followiing code at line 16 NotifyPropertyChanged("Data");  C、Insert the followiing code at line 14 NotifyPropertyChanged(value);  D、Insert the followiing code at line 16 NotifyPropertyChanged(value);  

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第2题
[] Client exclusion policies are used to mitigate which of the following attacks？（）

A、A.dictionary  B、B.bit-flip and replay  C、C.mac spoofing  D、D.man-in-the-middle  

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第3题
[单选题] The center of flotation of a vessel is the point in the waterplane（）.

A、about which the vessel lists and trims  B、which coincides with the center of buoyancy  C、which，in the absence of external forces，is always vertically aligned with the center of gravity  D、which is shown in the hydrostatic tables as VCB  

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第4题
[单选题] For a floating vessel,the center of the floating is the point in the waterpiane.（）.

A、aboat which the vessel lists and trims  B、which coincides with the center of buoyancy  C、which, in the absence of external forces, is always vertically aligned with the center of gravity  D、which is shown in the hydrostatic tables as VCB  

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第5题
[单选题] A class B network 129.35 has 10 subnets. Which of the following options is the correct subnet mask？（）

A、255.255.128.0 （11111111.11111111.10000000.00000000）  B、255.255.192.0 （11111111.11111111.11000000.00000000）  C、255.255.224.0 （11111111.11111111.11100000.00000000）  D、255.255.240.0 （11111111.11111111.11110000.00000000）  

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第6题
[单选题] For a floating vessel，the center of flotation is the point in the waterplane（）.

A、about which the vessel lists and trims  B、which coincides with the center of buoyancy  C、which，in the absence of external forces，is always vertically aligned with the center of gravity  D、which is shown in the hydrostatic tables as VCB  

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第7题
[单选题] A user wants to upgrade to Windows 2000. Which of the following WINNT32 command switches can be run to determine whether the users computer and software is compatible with the new operating system？（）

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第8题
[单选题] The center of flotation of a vessel is（）.

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第9题
[单选题] Line throwing apparatus aboard ship must contain（）.

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第10题
[单选题] A feedback is an input（）

A、which governs the state of a variable  B、which provides a visual and audible alarm  C、which indicates values of controlled variables  D、which measures the state of the controlled variable  

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