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Block system is a kind of train operation, which means when a section is occupied by a tra

8. Block system is a kind of train operation, which means when a section is occupied by a train and no other train is allowed to use that section until the proceeding train has traversed that section.

提问人：网友lina11558976 发布时间：2022-01-07

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第1题

5. An absolute block system is entirely absolute.

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第2题

the block diagram of a causal c-t lti system is shown below. then the transfer function

The block diagram of a causal C-T LTI system is shown below. Then the transfer functionof the system is

A、

B、

C、

D、

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第3题

9. Semi-automatic block system can be only adopted on signal track lines.

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第4题

the block diagram of a causal d-t lti system is shown below. if the system is stable, what condition should the constant

The block diagram of a causal D-T LTI system is shown below. If the system is stable, what condition should the constantsatisfy？

A、

B、

C、

D、

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第5题

A block–spring system vibrating on a frictionless, horizontal surface with amplitude of 6.

0 cm has energy of 12 J. If the block is replaced by one whose mass is twice the mass of the original block and the amplitude of the motion is again 6.0 cm, what is the energy of the system？

A、48J

B、24J

C、12J

D、6J

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第6题

Fill in the 10 blanks with appropriate words and expressions from reading A. 4. When absolute block system is implemented, may enter a block with .

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第7题

In a certain cache system, the modified cache block is written to main memory only when th

e block is replaced.All of following are used to describe this policy EXCEPT

A．store-in

B．write-back

C．copy-back

D．write-through

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第8题

In a certain cache system, the modified cache block is written to main memory only when th

e block is replaced. All of the following are used to describe this policy EXCEPT(71).

A．store-in

B．copy-back

C．write-back

D．write-through

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第9题

The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）

A．causes colloid suspension in the cooling water

B．reduces the capability of the lubrication system

C．can form pockets which block the flow of coolant through the system

D．leads to the scuffing of cylinder wall

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第10题

Many luxury automobiles have thermostatically controlled air-conditioning system for the c

omfort of the passengers. Sketch a block diagram of an air-conditioning system where the driver sets the desired interior temperature. Identify the function of each element of the thermostatically controlled cooling system.

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第11题

Translate the following English into Chinese. 5. In a permissive block system, trains are permitted to pass signals indicating the line ahead is occupied, but only to do so in a manner where they can

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