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A typical application of this (71) is ADSL. It is emerging as the technology for home-and small-office Internet connectivity. It provides either 1.5 Mb/s~8 Mb/s from the network to the user and 64 Kb/s~512 Kb/s in the reverse direction depending on the distance, 12 000 or 18 000 feet.. The different speed for each direction gives it the (72) label. ADSL is designed to take advantage of the fact that video-on demand, telecommuting, and Internet access traffic are inherently asymmetrical. The user (73) a brief message up to the network and receives a ton of data coming back, either a movie or a piece of data download. Under such a scenario, low-speed traffic to the network is just fine. ADSL delivers high (74) where you need it and only uses a single copper pair. Through multiplexing, it also reserves (75) of the bandwidth for POTS.

A. asymmetric
B. compressed
C. irregularity
D. symmetric

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College sports in the United States are a huge deal. Almost all major American universities have football, baseball, basketball and hockey programs, and (21) millions of dollars each year to sports. Most of them earn millions (22) as well, in television revenues, sponsorships. They also benefit (23) from the added publicity they get via their teams. Big-name universities (24) each other in the most popular sports. Football games at Michigan regularly (25) crowds of over 90,000. Basketball’s national collegiate championship game is a TV (26) on a par with (与…相同或相似)any other sporting event in the United States, (27) perhaps the Super Bowl itself. At any given time during fall or winter one can (28) one’s TV set and see the top athletic programs--from schools like Michigan, UCLA, Duke and Stanford -- (29) in front of packed houses and national TV audiences.The athletes themselves are (30) and provided with scholarships. College coaches identify (31) teenagers and then go into high schools to (32) the country’s best players to attend their universities. There are strict rules about (33) coaches can recruit--no recruiting calls after 9 p. m., only one official visit to a campus--but they are often bent and sometimes (34) Top college football programs (35) scholarships to 20 or 30 players each year, and those student-athletes, when they arrive (36) campus, receive free housing, tuition, meals, books, etc.In return, the players (37) the program in their sport. Football players at top colleges (38) two hours a day, four days a week from January to April. In summer, it’s back to strength and agility training four days a week until mid-August, when camp (39) and preparation for the opening of the September-to-December season begins (40) . During the season, practices last two or three hours a day from Tuesday to Friday. Saturday is game day. Mondays are an officially mandated day of rest. 38().

A. work in
B. work out
C. work over
D. work off

College sports in the United States are a huge deal. Almost all major American universities have football, baseball, basketball and hockey programs, and (21) millions of dollars each year to sports. Most of them earn millions (22) as well, in television revenues, sponsorships. They also benefit (23) from the added publicity they get via their teams. Big-name universities (24) each other in the most popular sports. Football games at Michigan regularly (25) crowds of over 90,000. Basketball’s national collegiate championship game is a TV (26) on a par with (与…相同或相似)any other sporting event in the United States, (27) perhaps the Super Bowl itself. At any given time during fall or winter one can (28) one’s TV set and see the top athletic programs--from schools like Michigan, UCLA, Duke and Stanford -- (29) in front of packed houses and national TV audiences.The athletes themselves are (30) and provided with scholarships. College coaches identify (31) teenagers and then go into high schools to (32) the country’s best players to attend their universities. There are strict rules about (33) coaches can recruit--no recruiting calls after 9 p. m., only one official visit to a campus--but they are often bent and sometimes (34) Top college football programs (35) scholarships to 20 or 30 players each year, and those student-athletes, when they arrive (36) campus, receive free housing, tuition, meals, books, etc.In return, the players (37) the program in their sport. Football players at top colleges (38) two hours a day, four days a week from January to April. In summer, it’s back to strength and agility training four days a week until mid-August, when camp (39) and preparation for the opening of the September-to-December season begins (40) . During the season, practices last two or three hours a day from Tuesday to Friday. Saturday is game day. Mondays are an officially mandated day of rest. 36().

A. in
B. on
C. at
D. around

College sports in the United States are a huge deal. Almost all major American universities have football, baseball, basketball and hockey programs, and (21) millions of dollars each year to sports. Most of them earn millions (22) as well, in television revenues, sponsorships. They also benefit (23) from the added publicity they get via their teams. Big-name universities (24) each other in the most popular sports. Football games at Michigan regularly (25) crowds of over 90,000. Basketball’s national collegiate championship game is a TV (26) on a par with (与…相同或相似)any other sporting event in the United States, (27) perhaps the Super Bowl itself. At any given time during fall or winter one can (28) one’s TV set and see the top athletic programs--from schools like Michigan, UCLA, Duke and Stanford -- (29) in front of packed houses and national TV audiences.The athletes themselves are (30) and provided with scholarships. College coaches identify (31) teenagers and then go into high schools to (32) the country’s best players to attend their universities. There are strict rules about (33) coaches can recruit--no recruiting calls after 9 p. m., only one official visit to a campus--but they are often bent and sometimes (34) Top college football programs (35) scholarships to 20 or 30 players each year, and those student-athletes, when they arrive (36) campus, receive free housing, tuition, meals, books, etc.In return, the players (37) the program in their sport. Football players at top colleges (38) two hours a day, four days a week from January to April. In summer, it’s back to strength and agility training four days a week until mid-August, when camp (39) and preparation for the opening of the September-to-December season begins (40) . During the season, practices last two or three hours a day from Tuesday to Friday. Saturday is game day. Mondays are an officially mandated day of rest. 37().

A. commit themselves to
B. commit themselves on
C. commute themselves to
D. comply themselves to

College sports in the United States are a huge deal. Almost all major American universities have football, baseball, basketball and hockey programs, and (21) millions of dollars each year to sports. Most of them earn millions (22) as well, in television revenues, sponsorships. They also benefit (23) from the added publicity they get via their teams. Big-name universities (24) each other in the most popular sports. Football games at Michigan regularly (25) crowds of over 90,000. Basketball’s national collegiate championship game is a TV (26) on a par with (与…相同或相似)any other sporting event in the United States, (27) perhaps the Super Bowl itself. At any given time during fall or winter one can (28) one’s TV set and see the top athletic programs--from schools like Michigan, UCLA, Duke and Stanford -- (29) in front of packed houses and national TV audiences.The athletes themselves are (30) and provided with scholarships. College coaches identify (31) teenagers and then go into high schools to (32) the country’s best players to attend their universities. There are strict rules about (33) coaches can recruit--no recruiting calls after 9 p. m., only one official visit to a campus--but they are often bent and sometimes (34) Top college football programs (35) scholarships to 20 or 30 players each year, and those student-athletes, when they arrive (36) campus, receive free housing, tuition, meals, books, etc.In return, the players (37) the program in their sport. Football players at top colleges (38) two hours a day, four days a week from January to April. In summer, it’s back to strength and agility training four days a week until mid-August, when camp (39) and preparation for the opening of the September-to-December season begins (40) . During the season, practices last two or three hours a day from Tuesday to Friday. Saturday is game day. Mondays are an officially mandated day of rest. 40().

A. in principle
B. in confidence
C. in name
D. in earnest

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