To avoid excessive pressures in the fuel oil filling system during bunkering, you should （）.

A . the relief valve should open before the high pressure cutout B . the relief valve should open and allow the excess refrigerant to flow to the receiver C . the high pressure cutout switch should operate before the relief valve opens D . you should close in on the suction valve

A . Each vent for the tank must be equal to the area of the tank filling line B . The tanks must be protected by overflows C . The total area of the vents or the overflow shall be at least equal to the area of the fill line D . There must be twice as much vent area as the area of the fill line

A . to alter B . alter C . altering D . altered

A . meeting B . tomeet C . meet

A . （1），（2） B . （2），（3） C . （1），（2），（3） D . （2）only

A . improper adjustment of the bypass valve B . a dribble in the fuel injection nozzle C . insufficient leak-off through injection nozzle packing D . a malfunctioning injection nozzle

A . later and close sooner B . sooner and close later C . sooner and close sooner D . later and close later

A . pressure vacuum relief valves B . excess flow valves C . safety relief valves D . flame scree

A．they have attracted too many deposits. B．they could not find enough suitable borrowers. C．they have borrowed too much from the central bank. D．All of the above.

A、hazard B、harm C、damage D、fatigue

A．Having a clearance sale. B．Giving out free samples. C．Driving to the head office. D．Meeting with a client.

retire prefer 【C7】______ in the mainstream of life by working a few hours a day or 【C8】______ a week. Twenty-one percent of the 【C9】______ force is now working on a pan-time 【C10】______ , according to the U.S. Bureau of Labor Statistics. Many jobs have been 【C11】______ --or totally restructured--so that two people can work 【C12】______ what was formerly one full-time job. In other 【C13】______ , people create a new way of working together, 【C14】______ different aspects of the responsibility. Sometimes 【C15】______ work fulltime during peak periods but then merely cover for each other in less busy times. 【C1】 A．grow B．grown C．growing D．increased

A．cautious predictions. B．impartial judgment. C．careful calculation. D．simple statistics.

The early years of development are critical years for learning abut oneself. The sport setting is one where valuable experiences can take place. Young athletes can, for example, learn how to cooperate with others, make friends, and gain other social skills that will be used throughout their lives. Coaches and parents should be aware, at all times, that their feedback to youngsters can greatly affect their children. Youngsters may take their parents’ and coaches’ criticisms to heart and find a flaw (缺陷) in themselves. Coaches and parents should also be cautious that youth sport participation does not become work for children. The outcome of the game should not be more important than the process of learning the sport and other life lessons. In today’s youth sport setting, young athletes may be worrying more about who will win instead of enjoying themselves and the sport. Following a game, many parents and coaches focus on the outcome and find fault with youngsters’ performances. Positive reinforcement should be provided regardless of the outcome. Research indicates that positive reinforcement motivates and has a greater effect on learning than criticism. Again, criticism can create high levels of stress, which can lead to burnout. 第16题：An effective way to prevent the burnout of young athletes is ________. A) to make sports less competitive B) to make sports more challenging C) to reduce their mental stress D) to increase their sense of success

是 否

A．avoid any changes B．make some changes C．be free of dangerous things D．stay away from the opportunities