For lasers with tightly controlled wavelengths, approximately how far apart are the centers of adjacent wavelengths when 100 GHz spacing is used in a DWDM system?（）

A . the discharge valve is open B . the control box glass is broken C . pressure from the control cylinders is detected D . the control cylinders have been completely discharged

A . Use the CO system and evacuate the engine room B . Use the fire main system and evacuate the engine room C . Evacuate the engine room and use the CO system D . Evacuate the engine room and use the fire main system

A . use all CO available to cool the surrounding area B . stand by with water or other agents C . thoroughly ventilate the space of CO D . jettison all burning material

A . permit B . entitle C . authorize D . give the right to

A . attitude B . multitude C . gratitude D . latitude

A . 1.78mm B . 1.84mm C . 0.25mm D . 1.30mm

A . Turning the laser to a specific ITU channel B . Keeping the signal wavelength "locked" to a specific technology C . Suppressing FWM and SBS non-linear effects D . None ofthe above

A .  0.4 nanometers B .  0.6 nanometers C .  0.8 nanometers D .  1.2 nanometers E .  1.6 nanometer

A．of B． for C． with D． in

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Fear is the driver's constant companion, and tragedy can be just a step behind.Scarcely a man in the 500 does not carry the scars of ancient crashes.The mark of the plastic surgeon is everywhere, and burned skin is common.Sometimes a driver's scars are invisible, part of his heritage.Two young drivers, Billy Vukovich and Gary Bettenhausen, raced in their first 500 in 1968.Less than 20 years before, their fathers also competed against one another on the Indy track-and died there.All this the drivers accept.Over the years, they have learned to trust their own techniques, reflexes, and courage.They depend, too, on a trusted servant-scientific engineering.Though they may not have had a great deal of schooling(an exception is New Zealand's Bruce McLaren, who has an engineering degree), many drivers are gifted mechanics, with a feeling for their engines that amount to kinship.A few top drivers have become extremely wealthy, with six-figure incomes from prize money, endorsements, and jobs with auto-product manufacturers.Some have businesses of their own.McLaren designs racing chassis(底盘).Dan Gurney's California factory manufactured the chassis of three of the first four ears in the 1968 Indy 500, including his own second place car.Yet money is not the only reason why men race cars.Perhaps it isn't even the major reason.Three-time Indy winner(1961,1964,1967)A.J.Foyt, for example, can frequently be found competing on dirty tracks in minor-league races, where money, crowds and safety features are limited, and only the danger is not.Why does he do it？ Sometimes Foyt answers, "It's in my blood." Other times he says, "It's good practice." Now and then he replies, "Don't ask dumb questions." 1.The statement "it is usually their nerves that go first" means ________. A.at first they all have a nervous look B.they often find they can't bear the tension even if they are in good condition C.someday they find they can't make responses to any risk D.they can continue their career at most until the middle 40s 2.It can be inferred that a car accident is often coupled with ________. A.a plastic surgeon B.a companion C.a risk D.a fire 3.The invisible scars of the drivers mentioned in the second paragraph refers to ________. A.the regrets left by their fathers B.the fears left by their fathers C.the cars left by their fathers D.the heritage left by their fathers 4.Bruce McLaren is different from most of the drivers in that ________. A.he himself designs chassis B.he has an engineering degree C.he manufactures chassis D.he is a gifted mechanic 5.A.J.Foyt often takes part in minor-league races for ________. A.prize money B.blood test C.cheers from the crowd D.Enjoyment

A．suit B．furnish C．regard D．cater

______

Dolphin-assisted therapy for children with mental disabilities has made a splash in the West, and China is now riding the experimental tide. More than 80 parents of children with severe mental disabilities have booked all of next years spots in the program.(Sessions only run in the summer because the water temperatures are too cold for the kids in other seasons.)However, newcomers must wait until 2014, says Liu【M1】______ Quansheng, manager of the parks owner, Zhejiang Aquarium Investment Group. Despite of the demand, dolphin-assisted therapy has not been 【M2】______ scientifically proven. Still, many experts and parents of special-needs children swear in it. While the science of dolphin-assisted therapys 【M3】______ assortment of purported benefits hasnt been verified, many believe at least some benefits come from the experiences emotional magic. "Once the children are in the pool theyre only focused on the dolphins. They love it, because the creatures let the kids touch and kiss them, grab their fins and swim with them." Most opponents agree on the merit of the fun factor. Some also 【M4】______ claim it boost peoples immune systems. And many experts contend the【M5】______ therapys benefits run deeper. Dolphins presence palpably changes water. Those which swim with the creatures report fizzing sounds, as if【M6】______ the marine mammals carbonate the water. The sound has been compared as popcorn, flames and sparklers. The marine animals 【M7】______ ultrasonic energy is four times powerful than scientific instruments 【M8】______ using to peer inside the body to make diagnoses, monitor pregnancies 【M9】______ and break in kidney stones, gallstones and cataract-clouded lenses. This【M10】______ is amplified by the water, which transmits sounds at 60 times airs efficiency. The ultrasonic energy then enters our bodies — which are, in turn, mostly water. But how — and if — this helps children with mental disabilities remains unclear. 【M1】

是 否

A．To Autumn B．Ode to the West Wind C．Ode to a Nightingale D．Ode on Melancholy