Part I Reading(40%) Passage 1 Malcolm Greenway is thirty-five years old, married with two children. He lives in a town about twenty kilometers away from the school in which he teaches, and goes to work every morning by car. The village school was built about forty years ago by the local education authority for only about sixty. a new room has recently been added to be used as a dining room, and the playground has been enlarged and improved. A woman teacher is in charge of the youngest children
Part I vocabulary and structure: 30% A: make the best choice 1. she was able to cope the difficulties she met with A in B with C. of d. to 2. Would you mind the radio? A not turn on B. not to turn on C. not turning on D. not turned on The lion is a of courage bol B sign C. mark D anima
Part I Reading Comprehension (40%) Task 1 Directions: Choose the best answer from the 4 choices Air pollution can spread from city to city. It even spreads from one country to another. Some northern European countries have had\black snow\ from pollutants that have traveled through the air from other countries and have fallen
Introduction Frequency-selective fading is a dominant impairment in mobile communications Fading reduces receive signal-to-noise ratio and degrades the bit-error-rate(BER) Frequency selectivity of the channel, i. e, delay spread, induces inter-symbol interference(ISI) To combat frequency-selective fading
Flow control: end-to-end mechanism for regulating traffic between source and destination Congestion control: Mechanism used by the network to limit congestion The two are not really separable, and I will refer to both as flow control In either case, both amount to mechanisms for limiting the amount of traffic entering the network Sometimes the load is more than the network can handle Eytan Modiano
