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更多“The first line in Xi’an runs f…”相关的问题
The "current games" (line 1, para. 3) refers to ______.
A．new games to be played for the first time
B．old games no longer played
C．the most popular games at the time
D．games played at the time
A. across 13. over C. between D. within
A．talking with his friends
B．reading his autobiography
C．studying his poetry
D．meeting him
From the last three paragraphs we know that ______.
A．lengthening the existing 53-kilometer subway is among the 50 large projects
B．the length of the subway will be up to 135.25 kilometers in 2005
C．a 40.5-meter-long line will be added to Beijing's first light railway
D．a 70-meter-wide green belt will supply us with enough water
ace level (i.e. the complement of a mark) for one element period. This element is called the start bit and has a duration of T seconds. The transmitter then sends the character, l bit at a time, by placing each successive bit on the line for a duration of T seconds, until all bits have been transmitted. Then a single parity bit is calculated by the transmitter and sent after the data bits. Finally, the transmitter sends a stop bit at a mark level (i.e. the same level as the idle state) for one or two bit periods. Now the transmitter may send another character whenever it wishes.
At the receiving end of an asynchronous serial data link, the receiver continually monitors the line looking for a start bit. Once the start bit has been detected, the receiver waits until the end of the start bit and then samples the next N bits at their centers, using a clock generated locally by the receiver. As each incoming bit is sampled, it is used to construct a new character. When the received character has been assembled, its parity is calculated and compared with the received parity bit following the character. If they are not equal, a parity error flag is set to indicate a transmission error.
(1).When the transmitter wishes to send data, it first ().
A.places the line in a space level
B.puts the line in a mark level
C.sends a stop bit
D.places a bit at logical l level
(2).Then a single parity bit is calculated by the transmitter and ().
A.compared with the received parity bit
B.sent with the data bits
C.sent after the data bits
D.sent before the data bits
(3).At the receiving end of an asynchronous serial data link, the receiver continually monitors the line().
A.waiting for the end of the start bit
B.looking for a start bit
C.generating a clock
D.constructing a new character
(4).When the transmitter wishes to send data , it first sends().
A.a character at the same time
B.a character to the line
C.the start bit
D.a mark level to the line
(5).The transmitter then send the character, for a duration of T seconds().
A.each bit
B.all bits
C.successive bits
D.a start bit and a character
Which of the following can best express the main idea of the passage？ ()
A．Henry Ford changed American society with his invention of cars.
B．Henry Ford had a personality different from ordinary people.
C．Henry Ford was one of the greatest American industrialists.
D．Henry Ford built the first assembly line in the world.
The fastest transatlantic voyage by a packet mentioned by the author was from ______.
A．Liverpool to New York
B．New York to Liverpool
C．Liverpool to Baltimore
D．Baltimore to Liverpool
in a space level (i.e. the complement of a mark) for one element period. This element is called the start bit and has a duration of T seconds. The transmitter then sends the character, l bit at a time, by placing each successive bit on the line for a duration of T seconds, until all bits have been transmitted. Then a single parity bit is calculated by the transmitter and sent after the data bits. Finally, the transmitter sends a stop bit at a mark level (i.e. the same level as the idle state) for one or two bit periods. Now the transmitter may send another character whenever it wishes.
At the receiving end of an asynchronous serial data link, the receiver continually monitors the line looking for a start bit. Once the start bit has been detected, the receiver waits until the end of the start bit and then samples the next N bits at their centers, using a clock generated locally by the receiver. As each incoming bit is sampled, it is used to construct a new character. When the received character has been assembled, its parity is calculated and compared with the received parity bit following the character. If they are not equal, a parity error flag is set to indicate a transmission error.
(1).When the transmitter wishes to send data, it first sends().
A.a character at the same time
B.a character to the line
C.the start bit
D.a mark level to the line
(2).The transmitter then send the character, for a duration of T seconds().
A.each bit
B.all bits
C.successive bits
D.a start bit and a character
(3).Finally, the transmitter sends a stop bit at the same level as for one or two bit periods().
A.the space level
B.the mark level
C.the complement of the mark level
D.another character
(4).At the receiving end of an asynchronous serial data link, the receiver().
A.does not monitor the start bit
B.waits until the beginning of the start bit
C.samples the start bit at its center
D.generates a local clock
(5).When the received character has been assembled, its parity().
A.is set to indicate a transmission error
B.is compared with the received character
C.is an error flag
D.may be equal to the received parity
ICE-FISHING
If you drive north from Toronto for three hours, you come to Lake Nipissing. In winter, the lake becomes ice, and thousands of Canadian fishermen travel there each weekend. They build Little houses of wood on the ice and point them in bright colours. Then they sit inside to catch the fish that swim under the ice.
Bob Marvisch has come here at this time of year for twenty-five years. 'You need clothes that are light but worm: two pairs of socks and gloves, several thin sweaters and a snow suit on top. Catching the fish is easy,' he says. 'First you break the ice and make a small round hole in it. Next you take a fishing line and put some bread on it. Then you put the line through the hole and into the water. You pull the line up when the fish eat the bread. They are between ten and twenty centimetres Long. Some people Like to eat them, but when I have caught three or four fish, I prefer to have some chocolate or other snack! Today I have caught twenty- five! It's a great sport and you can meet some nice people here!
Fishermen only use the houses on Lake Nipissing in winter.
A．Right
B．Wrong
C．Doesn't say
On line I met a man【59】said he was a manager in a big company in Dalian. We【60】pleasantly first, then exchanged e-mail【61】in order to keep in touch in the future.【62】, he sent me【63】. When I opened it, I found, to my【64】, a detailed(详细的) self-introduction including age,【65】, weight, habits and future plans. It was an advertisement for a dating(约会) service! I was hurt【66】felt rather angry.
When I told a veteran (有经验的) Internet surfer (网民)【67】my experience, he said it was not【68】! was【69】. The Web provides such a nice, large place to make friends, why do some people【70】it？
The relationship between one another should be mutual(互助的) politeness and【71】. Online we【72】see one another's physical form, but we are talking through our【73】. Such【74】as the one I met are not polite at all.
Since the Web belongs to everyone, every user has a duty to keep a friendly and polite atmosphere (氛围]). We need【75】honesty and respect on-line.
(36)
A．exciting
B．disappointing
C．surprising
D．frightening
