A.limit
B.monitor
C.modulator
D.interlock
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更多“An electrical device which pre…”相关的问题
第2题
A.Converts mechanical inputs into electrical command signals
B.Provides slat position only, for cockpit indication
C.is a sensing device that monitors slat/flap overspeed
第3题
A.magnetic amplifier
B.ship's service alternator
C.three-wire DC generator
D.saturable core reactor
第4题
A.电动机是把机械能转化为电能的装置A motor is a device that converts mechanical energy into electrical energy
B.电动机是利用通电线圈在磁场中转动的原理工作的The motor works on the principle that the current-carrying coil rotates in the magnetic field
C.发电机是把机械能转化为电能的装置A generator is a device that converts mechanical energy into electrical energy
D.发电机是利用电磁感应原理工作的 The generator works on the principle of electromagnetic induction
第5题
A.电动机是把机械能转化为电能的装置A motor is a device that converts mechanical energy into electrical energy
B.电动机是利用通电线圈在磁场中转动的原理工作的The motor works on the principle that the current-carrying coil rotates in the magnetic field
C.发电机是把机械能转化为电能的装置A generator is a device that converts mechanical energy into electrical energy
D.发电机是利用电磁感应原理工作的 The generator works on the principle of electromagnetic induction
第6题
A.电动机是把机械能转化为电能的装置A motor is a device that converts mechanical energy into electrical energy
B.电动机是利用通电线圈在磁场中转动的原理工作的The motor works on the principle that the current-carrying coil rotates in the magnetic field
C.发电机是把机械能转化为电能的装置A generator is a device that converts mechanical energy into electrical energy
D.发电机是利用电磁感应原理工作的 The generator works on the principle of electromagnetic induction
第7题
A．MD
B．RSA
C．DES
D．MIB
第8题
Learning Disabilities
Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times as many boys as girls have learning disabilities.
Since about 1970, new research has helped brain scientists understand these problems better. Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things. There is no longer any question that all learning disabilities result from differences in the way the train is organized.
You cannot look at a child and tell if he or she has a learning disability. There is no outward sign of the disorder. So some researchers began looking at the brain itself to learn what might be wrong.
In one study, researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things. One involved cells in the left side of the brain, which control language. These cells normally are white. In the learning disabled person, however, these cells were gray. The researchers also found that many of the nerve cells were not in a line the way they should have been. The nerve cells were mixed together.
The study was carried out under the guidance of Norman Geschwind, an early expert on learning disabilities. Doctor Geschwind proposed that learning disabilities resulted mainly from problems in the left side of the brain. He velieved this side of the brain failed to develop normally. Probably, he said, nerve cells there did not conncts as they should. So the brain was like an electrical device in which the wires were crossed.
Other researchers did not examine brain tissue. Instead, they measured the brain’s electrical activity and made a map of the electrical signals.
Frank Dully experimented with this technique at Children’S Hospital Medical Centre in Boston. Doctor Dully found large differences in the brain activity of normal children and those with reading problems. The differences appeared throughout the brain. Doctor Duffy said his research is evidence that disabilities involve damage to a wide area of the brain, not just the left side.
第41题 Which of the following is NOT mentioned in the passage？____________.
A Learning disabilities may result from the unknown area of the train
B learning disabilities may result from damage to a wide area of the train
C Learning disabilities may result from abnormal organization of the train cells.
D Leaning disabilities may result from problems in the left side of the brain.
第10题
Not only the choice of colors but also the general appearance of a room communicates and influences those inside. Another experiment presented subjects(受试者) with photographs of faces that were to be rated in terms of energy and well-being. Three groups of subjects were used; each was shown the same photos, but each group was in a different kind of room. One group was in an "ugly" room that resembled a messy storeroom. Another group was in an average room-a nice office. The third group was in a tastefully designed living room with carpets and curtains. Results showed that the subjects in the beautiful room tended to give higher ratings to the faces than did those in the ugly room. Other studies suggest that students do better on tests taken in comfortable, attractive rooms than in ordinary-looking or ugly rooms.
1.Investigators followed the movement of the two groups by ______.
A.an exhibit of paintings
B.constant observation
C.an electric device
D.the carpet
2.The first experiment showed that people who entered the white room ______ than the people in the dark brown room.
A.stayed longer in it
B.spent less time in it
C.were more active
D.walked more quickly
3.In the second experiment the subjects were asked to decide ______.
A.whether the people in the photos were bright or not
B.how energetic and healthy the people in the photos were
C.whether they liked the people in the photos or not
D.what mood the people in the photos were in
4.If students are to get better marks in exam, it's better to ______.
A.arrange them to sit in ordinary-looking rooms
B.decorate their bedrooms tastefully
C.ignore the environment they are in when they are taking exams
D.provide them with comfortable, nice rooms for taking the exam
5.The main idea of the passage is that ______.
A.studies make clear the effects of the color of a room on people's behavior
B.the color of a room affects the behavior. of the people in it
C.the color and general appearance of a room influence the behavior. and attitude of the people in it
D.beautifully decorated rooms can cheer up the people inside
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