更多"The fish that have developed long f"的相关试题:
[单项选择]Some fish have a greater ______ for acid water than others.
A. tolerance
B. resistance
C. dependence
D. persistence
[单项选择]Neuroscientists have long understood that the brain can rewire itself in response to experience—a phenomenon known as neuroplasticity. But until recently, they didn"t know what causes gray matter to become plastic, to begin changing. Breakthrough research by a team at MIT"s Picower Institute for Learning and Memory has documented one type of environmental feedback that triggers plasticity: success. Equally important and somewhat surprising: Its opposite, failure, has no impact. Earl Miller, the lead researcher on the study, says understanding the link to environmental feedback is crucial to improving how people teach and motivate because it"s a big part of how we learn. But we absorb more from success than from failure, according to the study. Miller"s researchers gave monkeys a simple learning task: They presented one of two pictures. If it was Picture A, the monkeys were supposed to look to the left; if Picture B, to the right. When the monkeys looked in the correct direction, they were rewarded with a drop of juice. All the while the team recorded brain function. "Neurons(cells specialized to conduct nerve impulses)in the prefrontal cortex and striatum, where the brain tracks success and failure, sharpened their tuning after success," says Miller. What"s more, those changes lingered for several seconds, making brain activity more efficient the next time the monkey did the task. Thereafter, each success was processed more efficiently. That is, the monkey had learned. "But after failure," Miller points out, "there was little change in brain activity." In other words, the brain didn"t store any information about what went wrong and use it the next time. The monkey just tried, tried again. Miller says this means that on a neurological level, success is actually a lot more informative than failure. If you get a reward, the brain remembers what it did right. But with failure(unless there is a clear negative consequence, like the shock a child feels when she sticks something in an electrical outlet), the brain isn"t sure what to store, so it doesn"t change at all. Does this research confirm the management tenet of focusing on your—and your team"s—strengths and successes Miller cautions against making too tidy a connection between his findings and an environment like the workplace, but he offers this suggestion: "Maybe the lesson is to know that the brain will learn from success, and you don"t need to dwell on that. You need to pay more attention to failures and challenge why you fail."Which of the following is true of Earl Miller"s research
A. It discovers neuroplasticity.
B. It is the first study of this kind.
C. It studies one environmental feedback.
D. It attests to one cause of neuroplasticity.
[单项选择]Experts have long pointed out that in the face of car-ownership explosion, ______.
A. road users should make more sacrifice
B. drivers should be ready to yield to each other
C. drivers should have more communication among themselves
D. drivers will suffer great loss if they pay no respect to others
[单项选择]What social scientists have long felt puzzled about
A. The mortality rate can not be predicted.
B. The death toll remained stable year after year.
C. A quota for each type of death has not come into being.
D. People lost their lives every year for this or that reason.
[单项选择]The social scientists have long felt confused about the fact that______.
A. 2,500 people accidentally commit suicide every year
B. the death rates remained stable year after year
C. a quota for each type of death has not established
D. people lost their lives every year for this or that reason
[单项选择]
Text 2
Scientists have long warned that some level of global warming is a done deal—due in large part to heat-trapping greenhouse gases humans already have pumped skyward. Now, however, researchers are fleshing out how much future warming and sea-level rise the world has triggered. The implicit message: "We can’t stop this, so how do we live with it" says Thomas Wigley, a climate researcher at NCAR.
One group, led by Gerald Meehl at NCAR, used two state-of-the-art climate models to explore what could happen if the world had held atmospheric concentrations of greenhouse gases steady since 2000. The results: Even if the world had slammed on the brakes five years ago, global average temperatures would rise by about 1 degree Fahrenheit by the end of the 21st century. Sea levels would rise by another 4 inches over 20th-century increases. Rising sea-levels would continue well beyond 2100, even without adding water from melting glaciers and i
A. call on people to prevent global warming.
B. present the results from two research models.
C. appeal to people to take adaptation as priority.
D. forecast the future trends of global warming.
[单项选择]Fried foods have long been frowned upon. Nevertheless, the skillet(长柄平底煎锅) is about our handiest and most useful piece of kitchen equipment. Strong woodcutters and others engaged in active labor requiring 4,000 calories per day or more will take approximately one-third of their rations prepared in this fashion. Meat, eggs, and French toast cooked in this way are served in millions of homes daily. Apparently the consumers are not beset with more signs of indigestion than afflicted by those who insist upon broiling, roasting, or boiling. Some years ago one of our most eminent physiologists investigated the digestibility of fried potatoes. He found that the pan variety was more easily broken down for assimilation than when deep fat was employed. The latter, however, dissolved within the alimentary, tract(消化道) more readily than the boiled type. Furthermore, be learned, by watching the progress of the contents of the stomach by means of the fluoroscope(荧光检查仪), tha
A. why the skillet is a handy piece of kitchen equipment
B. the digestibility of fried foods
C. how the experts can mislead the public in the area of food preparation
D. why fried foods have long been frowned upon
[单项选择]
Responsibilities—We all have them; most of us have more than we’d like. That doesn’t change the reality that, sooner or later, we all have to (1) up to them. But perhaps it does explain our (2) to add to the ever-growing list. There’s already so much to ’do in a day, why tack on an (3) burden
Unfortunately, it’s this kind of defeatist mentality (4) keeps people from enhancing their lives through proper (5) and exercise. Here is the salient point, though: The health and fitness benefits you’ll derive from (6) the necessary work are worth whatever sacrifices you must make (7) the way. I can’t count how many times I’ve heard the same (8) . Each time, I always give the same response: Yes, I say, working out is work. So is taking the (9) to eat right. (10) yourself on the couch or having drinks with friends after work is a lot easier th
A. place
B. position
C. location
D. attraction
