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The series of valves used to control the return flow in well control operations is called the（）.
A . valve assembly
B . standpipe manifold
C . accumulator manifold
D . choke manifold
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When the voltage remains constant and the resistance is increased in a series circuit, the flow of current （）
A . increases by the square of the original value
B . increases
C . remains the same
D . decrease
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The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
A . Cross
B . Parallel
C . Counter
D . Circular
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Network equipment supporting the use of flow control mechanisms has been recently installed. What is the purpose of flow control in a data network?（）
A . It ensures that data is retransmitted if an acknowledgment is not received.
B . It reassembles segments in the correct order on the destination device.
C . It provides a mechanism for the receiver to control the transmission speed.
D . It regulates the size of each datagram segment.
E . All of the above are functions of flow control
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Systems of inbound and outbound lanes to promote the safe flow of vessel traffic in certain areas around the world are known as（）.
A . merchant vessel reporting systems
B . traffic separation schemes
C . collision avoidance fairways
D . restricted maneuverability channel
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A(n) （） is a mechanical attack on the metal surface which may be due to a disturbance in the flow of the water over the blade of the propeller.
A . erosion
B . corrosion
C . pitting
D . dezincificatio
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Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in （）
A . increased horsepower
B . reduced efficiency
C . increased heat loss
D . lower cylinder pressure
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In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
A . Globe valve
B . Butterfly valve
C . Gate valve
D . Packless valve
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The pipe friction and the resistance will （） as a result of an increase in the amount of fluid flowing through the system.
A . reduce
B . rise
C . raise
D . fall
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Because of the reduced （） in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.
A . temperature
B . water level
C . pressure
D . rate of flow
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In a diesel engine, an integral liner is one in which the cooling water （） Ⅰ.flows through the cylinder liner jackets Ⅱ.touches the outer side of the liner
A . Ⅰ only
B . Ⅱ only
C . both Ⅰ and Ⅱ
D . neither Ⅰ and Ⅱ
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A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing，the water of（）.
A . high density will be on the left in the Northern Hemisphere
B . high density will be on the right in the Southern Hemisphere
C . low density will be on the left in the Northern Hemisphere
D . low density will be on the left in the Southern Hemisphere
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8. Globalization develops quickly due to the decline in barriers to the free flow of goods, services, and capital, and the technological change.
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Suzhou itself was founded as the Wu capital in the 6th century B.C. by the order of King _____, the first king of the Wu State.
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Ricky Inc. currently has free cash flow of $5m per year and a cost of capital of 12%. What is the value of Ricky Inc. if the free cash flows are expected to grow at a constant rate of 4% per annum?
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In the Black Scholes Model, which factor represents the volatility of the cash flow?
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Who offered his personal library when the capital building of Library of Congress was burned by British troops in 1814?
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听力原文： U.S. authorities have temporarily closed the American consulate in Nigeria's commercial capital, Lagos, because of a security threat. Other diplomatic missions in the city have done the same.
A statement read by a spokeswoman for the U.S. Embassy in Abuja, Claudia Anyaso, said a threat to security was the reason for closing the Lagos consulate Thursday afternoon.
"The U.S. Consulate in Lagos will close, beginning 3:00 p.m. local time June 16, because of a security issue of mutual concern to the U.S. mission in Nigeria and the government of Nigeria. This security issue is being addressed with the help and close collaboration of relevant Nigerian authorities."
U.S. officials would not give specific details on the threat.
The consulate remained closed Friday, while security staff reviewed the situation. It is scheduled to reopen Monday, said an official in Lagos.
The decision by American authorities in Nigeria prompted at least one other foreign mission to follow suit. British officials said their decision to close their consulate in Lagos Friday was a direct result of U. S. security concerns.
Several countries have consulates near the American mission. British officials said other countries had followed the American example.
Nigeria, Africa's most populous country, is home to several festering civil conflicts. An armed struggle for control over the oil-rich Niger Delta regularly leads to the abduction of foreign nationals. Violent clashes frequently erupt between the country's Muslims and Christians.
Al-Qaida leader Osama Bin Laden has cited Nigeria as a candidate for, what he called, "liberation."
Why have U.S. government temporarily closed the American consulate in Lagos？
A．Because of political disturbance there.
B．Because of economic crisis there.
C．Because of security threat there.
D．Because of the workers' strike there.
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He was_____in the streets of the Mexican capital by more than a million people, most of them sincerely inspired.
A．acclaimed
B．attested
C．ratified
D．considered
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In the second sentence of the first paragraph, the word "capitalize" means______.
A．invest
B．benefit
C．make profit
D．gain
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The building up of fat in the arteries can the flow blood, and a heart attack or stroke.
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______ the capital of New South Wales, is the oldest and largest city in Australia.
A．Melbourne
B．Sydney
C．Darwin
D．Canberra
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Melbourne, the second largest city in Australia, is the capital of______state.
A．Queensland
B．Victoria
C．South Australia
D．Western Australia
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Which of the following represents a productivity-enhancing investment in human capital？
A．A new labor-saving technology．
B．A new health clini
C．A new factory that will employ 1,000 workers．
D．An increase in fringe benefits, such as paid vacations and over time pay．
