lf a machine jams, take time to undo the jam or to tell the proper person to attend to it.

A . two frequencies must be brought into phase B . the incoming machine accepts a small amount of load C . the running machine must be unload D . both voltages are equal

A .  Check  /etc/hosts.  B .  Check  /etc/resolv.conf.  C .  Check for packet errors.  D .  Check to see if the master server is up.

A . 500 B . 550 C . 590 D . 618

A . Trip the pump relief valve B . Order the dock man to shut down C . Call the owner，operator，or terminal supervisor D . Run out the vessel's or terminal's fire hose

This is how the new machines work. A machine is placed in an area far away from the person who controls it. The person wears a special hard hat with tiny television screens. The screens【23】the person see and hear exactly what the machine is seeing and hearing. This gives the person the feeling of being in the same place【24】the machine. The person controls the machine. The machine follows the person's movements exactly. If the person raises his right arm, the machine raises the right arm, too. This means an【25】worker can do a dangerous job while【26】in a safe place. For example, a person can direct the machine【27】a bomb【28】gooing near the bomb himself. The new machines are not exactly【29】robots. Robots are controlled by a computer. The new machines are controlled by a person. The new machines are called teleoperators. The nuclear power industry is especially interested in teleoperators. The machines could solve the problem of【30】radioactive materials. (66) A．is developing B．has developed C．develops D．is being developed

Computers, which once only remembered data, will make more decisions. Machines that today tell doctors what symptoms the patients have may soon be recommending whether or not to perform. surgery as well. Others will design new buildings after questioning buyers about their preferences. Increasingly, human thought processes and even values are being programmed into computers, according to Earl Joseph, president of a consulting firm. "Imagine machines which are smarter and more intelligent than humans and, with their embedded(植入的) initiative, can't wait to tell you about it," he says. In everyday life, the future will mean talking directly to computers without pushing buttons. Just tell a toaster, stove or other kitchen device what to do, and it will hear the message. The oven may even decide itself how long to cook the roast. Tell the television, "I want to watch Channel 12 at 8 p.m., but store the show for next week," and the job will be done. The computer will talk back, too. Already some soft-drink machines complain loudly if you don't deposit enough cash. At home, a bedside machine may someday tell you, "You forgot to turn off the basement light." Away from home, the automobile of the future will think for itself. Scientists predict that drivers will feed destinations into a computer that will then explain what route to take and even tell where parking spaces are available. A city's traffic-control system might instruct the car's computer how fast to go in heavy traffic and whether to change lanes. This passage mainly discusses ______. A．the history of computers B．the different functions of computers C．the computer in the 21st century D．scientific breakthroughs in the 21st century

A．had leaked B．leaked C．is leaking D．has been leaking

B、held back C、restrained D、unable to breathe

How can a discount voucher be obtained？ A．By purchasing more than two items B．By visiting the personnel department C．By calling a nearby Ruston office D．By sending an e-mail to the customer service department

B、LS-EF C、LS-ES D、LF-ES