单选题Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals（）A an injection processB an ejection processC a separation processD a heating process

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单选题

Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals（）

an injection process

an ejection process

a separation process

a heating process

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相似问题和答案

第1题：

[ A] patterns

[ B] designs

[ C] plans

[ D] schemes

正确答案：C
27．C【精析】pattern图案；design设计图样；plan规划；scheme方案。这里指的是为潮汐电站做出规划，排除A和B项。虽然plan和 scheme都有计划、方案的意思，但是plan还有“规划”的意思，即在某事真正进行之前已经详细考虑了实施步骤，故选C。

第2题：

After seeing the good students’ designs，some students _________.

A. 1oved their own designs more

B. thought they had a fair chance

C. put their own designs in a comer

D. thought they would not win the prize

正确答案：D
【解析】细节理解题。由第四段倒数第二句Some of us would wander past the good students’ desks and then return to our own projects with a growing sense of hopelessness可知。

第3题：

Protestantism has been the most dominant form. of religion in Australia over the first two hundred years of modern Australia society.()

此题为判断题(对，错)。

正确答案:√

第4题：

continuous culture

正确答案: 连续培养

第5题：

What are two characteristics of the relationship between the Cisco PIN architecture and CiscoValidated Designs? （）(Choose two.)

A、Cisco is focusing on Cisco Validated Designs as a means to driving integrated networks.
B、Cisco is focusing on the PIN architecture as a means to driving integrated networks.
C、The Cisco PIN architecture is a critical mechanism for supporting integrated markets because it can be implemented quickly.
D、The Cisco Validated Designs program provides critical mechanisms for supporting integrated markets because the mechanisms can be implemented quickly.
E、Cisco Validated Designs can be implemented quickly without customer input.

正确答案:B,D

第6题：

The VPN termination function provides the ability to connect two networks together securely over the internet. Which of these is true of IP addressing with regard to VPN termination?()

A. termination devices need routable addresses inside the VPN

B. termination devices need not routable addresses inside the VPN

C. IGP routing protocols will update their routing tables over anIPsec VPN

D. addressing designs need to allow for summarization

参考答案：D

第7题：

The VPN termination function provides the ability to connect two networks together securely overthe internet. Which of these is true of IP addressing with regard to VPN termination？（）

A、 termination devices need routable addresses inside the VPN
B、 termination devices need not routable addresses inside the VPN
C、 IGP routing protocols will update their routing tables over an IPsec VPN
D、 addressing designs need to allow for summarization

正确答案:D

第8题：

To maintain a telephone conversation over the Internet. The voice packets must arrive at their destination in ()

A.a continuous stream

B.a burst stream

C.a delayed stream

D.a burst mode

正确答案：A

第9题：

When is it appropriate to enable Link Fragmentation and Interleaving (LFI) on DSL connections for Teleworkers?（）

A、uplink speed less than 768kbps
B、supporting Voice-over-IP
C、using PPPoE encapsulation
D、using PPPoA encapsulation
E、uplink speed greater than 768kbps

正确答案:A,B,D

第10题：

What two descriptions best define DWDM？（）

A、 a WDM system that is compatible with EDFA technology
B、 an optical technology for transmitting up to 16 channels over multiple fiber strands
C、 an optical technology for transmitting up to 32 channels over multiple fiber strands
D、 a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDM
E、 a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM

正确答案:A,E

Modern centrifuge designs enable continuous over a considera

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