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During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.
A . 150 millimeters of water pressure
B . 125 millimeters of water pressure
C . 100 millimeters of water pressure
D . 75 millimeters of water pressure
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A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）
A、the use of a poor quality oil
B、the deterioration of its properties
C、the formation of deposits
D、the reduction in heat transfer ability
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Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from （）.
A . within the space concerned
B . outside the space concerned
C . the throttle station
D . within the fire room
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If a scavenge fire starts, the engine must be put to “（）” and the fuel must be taken off the cylinders affected by the fire.
A . stop engine
B . finished with engine
C . dead slow ahead
D . dead slow aster
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Fuel droplets injected into a diesel engine cylinder must have adequate penetration to （）
A . prolong the ignition delay period
B . ensure the beginning of fuel injection
C . thoroughly utilize the air charge
D . allow controlled fuel combustio
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Each drilling unit equipped with helicopter fuel storage tanks must have the tanks installed as far as practicable from the（）.
A . landing area and sources of vapor ignition
B . main deck
C . engine room
D . drill floor
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During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.
A . ensure penetration and distribution of the fuel in the combustion chamber
B . ensure the needle valve is flushed clean during each injection
C . prevent combustion gas blowback into the open needle valve
D . prevent reflected pressure waves when the needle valve close
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The amount of fuel delivered for each cycle must be in accordance with the engine load, and the same quantity of fuel must be delivered to each cylinder for each power stroke at that load.Which of the following statements describes this requirement?（）
A . Proper timing
B . Accurate metering
C . Suitable injection rate
D . Suitable atomization rate
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On the other hand, alternative fuels do have（）.
A . drawbacks
B . setback
C . drawer
D . backward
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The injection may be delayed, （）the pumps are in good order, if the fuel lines to the injection valves have not been cleared of air.
A . because
B . though
C . since
D . until
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The soot blowers are operating in the oil fuel boiler the air/fuel ratio must （） throughout the action, and blowers greased after use.
A . be increased
B . be decreased
C . remain constant
D . either be increased or remain constant
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Have
run
out of
fuel, the plane
crashed
to
the ground.
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Vlans have been enabled on an autonomous access point. in order for clients associating to vlans other than the native vlan to receive an ip address. Which of the following must be configured？（）
A . access point ethernet port set to ssl trunking
B . switchport set to 802.1q trunking
C . switchport set to ssl trunking
D . access point ethernet port not set to 802.1q trunking
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The vessel or other goods upon which the Works have been carried out must be（）from the Repairer’s worksite within 3 days after the invoice date or in accordance with other written notification by the Repairer to the Customer.
A . selected
B . collected
C . detected
D . effected
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A small fuel spillage has occurred during helicopter refueling. After the leak has been stopped and fire-control personnel have been notified and are standing by，the next step is to（）.
A . proceed with fueling operation
B . have helicopter move to a safer location
C . wash spilled fuel away with a flood of water
D . clean spilled fuel with rag
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Each hose in the fuel transfer system for helicopter refueling must have a（）.
A . static grounding device
B . quick-disconnect nozzle
C . splash guard
D . vapor recovery system
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Apart from special circumstances，the value of the goods for which compensation must be made，if they have been lost or damaged，（）that which they would have had at the time and place at which they ought to have been delivered in proper condition.
A . contains
B . remains
C . has
D . i
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VLANs have been enabled on an autonomous access point. In order for clients associating toVLANs other than the native VLAN to receive an IP address which of the following must beconfigured？（）
A . access point Ethernet port set to SSL trunking
B . switchport set to 802.1q trunking
C . switchport set to SSL trunking
D . access point Ethernet port not set to 802.1q trunking
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——I can't get through to the general manager's office anyhow.<p>——The line is busy. Someone___ the telephone.</p><p>A.must use</p><p> B.uses</p><p>C.must have been using </p><p>D. must be using</p><p><br></p>
A、
B、
C、
D、
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—I telephoned her many times, but I couldn’t get through to her home.—I think the line must have been out of order, _____________________?
A:don’t you;
B:do you;
C:wasn’t it;
D:hadn’t it
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The dot-com collapse may have been a disaster for Wall Street, but here in Silicon Valley, it was a blessing. It was the welcome end to an abnormal condition that very nearly destroyed the area in an overabundance of success. You see, the secret to the Valley's astounding multiple decade boom is failure. Failure is what fuels and renews this place. Failure is the foundation for innovation.
The valley's business ecology depends on failure the same way the tree-covered hills around us depend on fire it wipes out the old growth and creates space for new life. The valley has always been in danger of drowning in the unwelcome waste products of success too many people, too expensive houses, too much traffic, too little office space and too much money chasing too few startups. Failure is the safety valve, the destructive renewing force that frees up people, ideas and capital and recombines them, creating new revolutions.
Consider how the Internet revolution came to be. After half a decade of start-up struggles, for example, hundreds of millions of Hollywood dollars were going up in smoke. It all seemed like a terrible waste, but no one noticed that the collapse left one very important byproduct, a community of laid-off C++ programmers who were now expert in multimedia design, and out on the street looking for the next big thing.
These media geeks were the pioneer of the dot-com revolution. They were the Web's business pioneers, applying their newfound media sensibilities to create one little company after another. Most of these start-ups failed, but even in failure they advanced the new medium of cyberspace. A few geeks, like Silicon Graphics founder Jim Clark, succeeded and utterly changed our lives. In 1994 Clark was unemployed after leaving the company be founded, doggedly trying to develop a new interactive-TV concept. He approached Marc Andreessen, the co developer of Mosaic, the first widely used Internet browser, in hope of persuading Andreessen to help him design his new system. Instead, Andreessen opened Clark's eyes to the Web's potential. Clark promptly tossed his TV plans in the trash, and the two co-founded Netscape, the cornerstone of the consumer-Web revolution.
Like the interactive-TV refugees and generations of innovators before them, the dot-comers are already hatching new companies. Many are revisiting good ideas executed badly in the 1990s, while others are striking out into entirely new spaces. This happy chaos is certain to mature into a new order likely to upset an establishment, as it delivers life-changing wonders to the rest of us. But this is just the start, for revolutions give birth to revolutions. So let's hope for more of Silicon Valley's successful failures.
What is implied in the first sentence？
A．The Silicon Valley blamed its failure on the success of Wall Street.
B．The Silicon Valley is also noted for its complex ecological web.
C．The Silicon Valley takes a vain pride in its overabundant successes.
D．The Silicon Valley would benefit from the collapse in certain ways.
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In some ways, the human body is both like a furnace and like an engine. It must have fuel to produce heat as a furnace【C1】______. It must have fuel to produce motion and do【C2】______as an engine does. The nutrients(营养物)which【C3】______energy best are carbohydrates(碳水化合物)and fats. Protein can also be used as fuel. Minerals, vitamins, and water,【C4】______extremely valuable to the body, cannot be used as fuel.
If the body takes in more carbohydrates【C5】______are used for energy, the【C6】______is stored. Two storage places are the liver(肝)and muscles. There is a【C7】______, however, to the amount of carbohydrates they can【C8】______. When they are filled and they always【C9】______be for you to feel your best, excess carbohydrates are changed to fat and【C10】______around the body.
If the body does not take【C11】______a sufficient amount of food, it will use its stored fat for energy. If you【C12】______at all, the body would use up all the stored fats and【C13】______it would use its own protein in order to keep【C14】______as long as possible.
Therefore, the【C15】______amount of food you eat should be in【C16】______with your energy requirements. It is not necessary,【C17】______, for you to go【C18】______counting calories(卡路里)and weighing food. If a person is the【C19】______weight, it is safe to【C20】______that he is eating enough.
【C1】
A．has
B．needs
C．does
D．is
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There must have been someone who had informed the owner of the bathing center of the sudden crack-down or he______able to escape the sweep.
A．wouldn"t be
B．wouldn"t have been
C．might have been
D．needn"t have been
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What type of argument is the following argument？ None of the people who gave blood are people who were tested, so everybody who gave blood must have been untested.
A、Reasoning by principle.
B、Reasoning by definition.
C、Reasoning by analogy.
D、Reasoning by generalization.
