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[主观题]

The radar control that shortens all echoes on the display and reduces clutter caused by ra

in or snow is the ______.

A.sensitivity time control (sea clutter control)

B.receiver gain control

C.brilliance control

D.fast time constant (differentiator)

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更多“The radar control that shorten…”相关的问题

第1题

It is required that______should be used during the poor visibility if the radar’s screen s

hows heavy sea returns．

A.Gain Control

B.Brilliant Control

C.Anti-clutter Sea Control

D.Sweep Intercept

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第2题

In order to insure that the racon signal is visible on your 3 cm radar, the ______.A.10 cm

In order to insure that the racon signal is visible on your 3 cm radar, the ______.

A.10 cm radar should be placed on stangby or turned off

B.gain control should be turned to maximum

C.radar should be stabilized, head up

D.rain clutter control should be off but, if necessary, may be on low

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第3题

The word （) means "exclusive control of a particular market that is marked by th

A.duress

B.monopoly

C.void

D.patent

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第4题

A pilot cannot fly a plane by sight alone. In many conditions, such as flying at night and

landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300, 000 kilometers in one second. A radar set sends out a short burst of radio waves: Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word "radar," in fact, gets its name from the term "radio detection and ranging." "Ranging" is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms.

What is the main topic of this passage？

A．The nature of radar.

B．Types of ranging.

C．Alternatives to radars.

D．History of radar.

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第5题

In order to meet the demands of modern logistics, （) has become the brain to control th

A.transportation

B.information technology

C.packing

D.safety

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第6题

● The （75) process analyzes the effect of risk events and assigns a numerical rating to th

● The (75) process analyzes the effect of risk events and assigns a numerical rating to those risks.

A.Risk Identification

B.Quantitative Risk Analysis

C.Qualitative Risk Analysis

.Risk Monitoring and Control

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第7题

Quality assuranceA.refers to the prevention of product defectsB.is an auditing function th

Quality assurance

A . refers to the prevention of product defects

B . is an auditing function that provides feedback to the project team and client about the quality of output being produced.

C . is the technical process that include the construction of control charts which specify acceptability limits for conforming output.

D . A and B.

E . B and C

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第8题

The strong matrix versus a weak matrix.A.team members are more likely to be assigned to th

The strong matrix versus a weak matrix.

A . team members are more likely to be assigned to the project office in a strong matrix

B . strong matrix is more difficult to manage.

C . the balance of power has shifted away from the PM.

D . functional managers no longer has control over the technical processes.

E . All of the above.

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第9题

TCP/IP（71)layer protocols provide services to the application（72)running on a computer. Th

TCP/IP(71)layer protocols provide services to the application(72)running on a computer. The application layer does not define the application itself, but rather it defines(73)that applications need--like the ability to transfer a file in the case of HTTP. In short, the application layer provides an(74)between software running on a computer and the network itself. The TCP/IP application layer includes a relatively large number of protocols, with HTTP being only one of those. The TCP/IP(75)layer consists of two main protocol options--the Transmission Control Protocol(TCP) and the User Datagram Protocol(UDP).

A．application

B．transport

C．link

D．network

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第10题

Passage Four John Paul Jones was one of the founders of the United States Navy. During th

Passage Four

John Paul Jones was one of the founders of the United States Navy. During the Revolution, the colonies were desperate. They needed men to lead their small ships against the British fleet. Jones was more than willing to fight.

John Paul Jones had once been a captain of a British merchant ship. In 1773, his crew mutinied. One member of the crew tried to gain control of the ship. Jones shot the man to death. The mutiny took place near the port of Tobago, an island in the Caribbean. Authorities there decided to have a trial. This meant certain death for John Paul Jones, since the whole crew would testify against him. One night during a thunderstorm, he escaped from the jail.

He fled to the United States and lived with a family named Jones. His real name was John Paul. He added the name of Jones to his, in honor of the family. He outwitted the British ships that were sent to hunt him down.

When the American Revolution ended he went to serve in the Russian navy. There, he fought the Turks and achieved one of the few major naval victories in the history of Russia. He died in Paris at the age of forty-five.

John Paul Jones is considered both an American and Russian hero, but the English considered him a fugitive.

48. John Paul Jones won a major victory for the Russian navy against the ______.

A. French

B. British

C. Turks

D. Spanish

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