[单项选择]The deep-sea listening system makes use of ______
A. the sophisticated technology of focusing sounds under water
B. the capability of sound to travel at high speed
C. the unique property of layers of ocean water in transmitting sound
D. low-frequency sounds traveling across different layers of water

[单项选择]The deep-sea listening system makes use of______ .
A. the sophisticated technology of focusing sounds under water
B. the capability of sound to travel at high speed
C. the unique property of layers of ocean water in transmitting sound
D. low-frequency sounds traveling across different layers of water

[单项选择]The underwater listening system was originally designed ______
A. to trace and locate enemy vessels
B. to monitor deep-sea volcanic eruptions
C. to study the movement of ocean currents
D. to replace the global radio communications network

[单项选择]The second paragraph makes use of which of the following
A. Specific examples.
B. Analogy.
C. Metaphor.
D. Quotation.

[单项选择]In the first paragraph, the author makes use of which of the following
A. (A) Metaphor
B. (B) Analogy
C. (C) Anecdote
D. (D) Hyperbole
E. (E) Hypothesis

[单项选择]In the first paragraph, the author makes use of all the following techniques EXCEPT
A. (A) extended metaphor
B. (B) enumeration and classification
C. (C) classical allusion
D. (D) direct quotation
E. (E) comparison and contrast

[名词解释]casual listening

[单项选择]Besides its main use the noise-killing system can______.
A. make a car lighter
B. make a car quieter
C. reduce the cost of a silencer
D. improve the performance of a silencer

[单项选择]The new staff didn't know how to use the system ________I explained it to him yesterday.
A. until
B. because
C. if
D. since

[单项选择] You use Microsoft System Center Virtual Machine Manager （VMM） 2008 R2 to create and manage virtual machines （VMs）. You attempt to create the first VM on a Hyper-V host by using Windows PowerShell. You receive an error message stating that the New-VM PowerShell cmdlet is not recognized. You need to be able to create VMs by using PowerShell. What should you do？（）
A. .Install the VMM Self-Service Portal.
B. Enable the Windows PowerShell Integrated Scripting Environment feature.
C. In PowerShell， run the Add-PSSnapin Microsoft.SystemCenter.VirtualMachineManager cmdlet.
D. Run the Create-VM -Name "VM01" -VirtualHardDisk $VHD -VMHost $VMHost -Path "C:///MyVMs" PowerShell cmdlet.