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What contributes to random failures in automatic control systems？
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A．Business English.B．US Culture.C．TOEFL.D．Computer.
A．There is no actual sales take place.B．It is up to parents to monitor their children.
听力原文： Today, I would like to begin by discussing early European settlement along one of our well-known rivers, the Hudson, which empties into the Atlantic to form. New York bay. The Hudson river has a couple of interesting physical features that made it very attractive for settlement by the Europeans. The first is that river extends inland from the Atlantic Ocean for more than 150 miles with no waterfalls or rapids. Its surface is virtually flat for that entire distance, with no obstacles. Second, the whole 150-mile stretch is influenced by tides from the Atlantic Ocean. Roughly every six hours, the river reverses direction, flowing north when the tide is rising and south toward the ocean when the tide is going down. Obviously there were no obstacles to prevent settlers from moving further upstream on the Hudson river and this explains why the Dutch penetrated so far inland. They were the first Europeans to settle in the Hudson valley. Of course, to go upstream, the Dutch settlers needed the right kind of boat, and so to navigate the river, they design a sloop with only one mast but two sails, one rigged in front of the mast and one behind. The mast was very tall, in many cases over 100 feet tall, so that the large sails could catch winds blowing above the shore line hills. Hudson river sloops carried passengers and cargo. The cargo ranging from coal, lumber and hay to fruit, vegetables and livestock. Traveling only ten miles an hour in a good wind, the sloop was not too speedy by modern standards, but it was ideally suited to the Dutch settlement, and in fact when the steam boat eventually was introduced, it couldn't keep up with the sloop.
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The Supreme Court's decisions on physician-assisted suicide carry important implications for how medicine seeks to relieve dying patients of pain and suffering.
Although it ruled that there is no constitutional right to physician-assisted suicide, the Court in effect supported the medical principle of "double effect", a centuries-olii moral principle holding that an action having two effects—a good one that is intended and a harmful one that is foreseen—is permissible if the actor intends only the good effect.
trol terminally ill patients' pain, even though increasing dosages will eventually kill the patient.
Professor George Ann as maintains that, as long as a doctor prescribes a drug for a legitimate medical purpose, the doctor has done nothing illegal even if the patient uses the drug to hasten death. "It's like surgery," he says. "We don't call those deaths homicides because the doctors didn't intend to kill their patients, although they risked their death. If you're a physician, you can risk your patient's death as long as you don't intend their suicide."
Just three weeks before the Court's ruling on physician-assisted suicide, the National Academy of Science (NAS) released a two-volume report, Approaching Death: Improving Care at the End of Life. It identifies the under-treatment of pain and aggressive use of "ineffectual and forced medical procedures that may prolong and even dishonor the period of dying" as the twin problems of end-of-life care.
The profession is taking steps to require young doctors to train in hospices, to test knowledge of aggressive pain management therapies, to develop a Medicare billing code for hospital-based care, and to develop new standards for assessing and treating pain at the end of life.
Ann as says lawyers can play a key role in insisting that these well-meaning medical initiatives translate into better care. "Large numbers of physicians seem unconcerned with the pain their patients are needlessly and predictably suffering," to the extent that it constitutes "systematic patient abuse." He says medical licensing boards "must make it clear...that painful deaths are presumptively (据推定) ones that are incompetently managed and should result in license suspension."
Which of the following best defines the word "aggressive" (Line 3, Para.5)？
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