相比于 confirmed reservations ， guaranteed reservations 更容易产生 no-show 。

A . Bandwidth that is reserved for SVCs to route over a trunk B . Bandwidth that is reserved on a trunk so that ABR connections can burst C . Bandwidth on a trunk that is reserved for control traffic and cannot be used by connections D . Bandwidth that cannot be allocated to connections but can be used to accommodate statistical variations in the traffic

A . 响应MSC的SETUP信号 B . 响应MSC的AUTHENTICATION REQUEST信号 C . 响应MSC的PAGING COMMAND

A、 unoccupied space below the waterline B、 volume of intact space above the waterline C、 excess of the buoyant force over the gravity force D、 difference in the buoyant force in salt and fresh waters

A . AccessClass0~9 B . AccessClass11 C . AccessClass0~9and11 D . AccessClass0

A . A、I NOW HAVE THE WATCH. B . B、I NOW HAVETHE CONN. C . C、YOU NOW HAVE THE WATCH. D . D、YOU NOW HAVE THE CONN.

A . of B . with C . off D . to

A . to B . with C . for D . of

A . A．to have received B . B．having received C . C．receiving D . D．toreceive

A．Lower than 1%. B．A little bit higher than its target rate. C．Quite large room left to further cutting. D．Higher than 1%.

是 否

A.By traditionally looking at a person"s blood under a microscope. B.By letting a person take some kind of medicine. C.By lighting up in the presence of a targeted molecule. D.By subjecting a person to an X-ray examination.

The area deforested in the past year was up 6% in 2003, far worse than the Brazilian government's predictions that it would rise by no more than about 2%. It was the second worst year for the destruction of the rainforest since satellite surveys began. It is reckoned that almost a fifth of the Brazilian part of the forest has now been wiped outs if it were to continue at this rate, it would all be flattened within the next two centuries. Things are hardly any better in those portions of Amazonia that lie in neighboring countries: Ecuador has lost about half of its forest, mainly due to illegal logging, in the past 30 years. Worse still, tropical forests have been disappearing at an even faster rate elsewhere in the world, such as in Africa. The world's greatest stores of biodiversity—and some of its main suppliers of the oxygen we breathe—are still being chewed up at an alarming rate, despite decades of talk among world leaders and environmentalists about the need to preserve them. As has been seen before in Brazil, the surge in the rate of deforestation is a sign that the country's economy is booming—recently it bas been growing at an annual rate of around 5%. Most of the timber felled illegally in Amazonia is sold to domestic buyers, in particular to the construction industry in Brazil's richer southern states. But the forest is also threatened by the rapid expansion of farming and ranching. In the past year, almost half of the total deforestation was in the state of Mato Grosso on the forest's southern part, where huge areas have been flattened to grow soybeans. Last year Brazil earned about $10 billion from exporting soy products, exceeding its income from coffee' and sugar, the country's traditional export crops. Mato Grosso's governor, Blairo Maggi, is also its soybean king—his family's farms are' the world's largest single producer of the crop. The rate at which the forest is being flattened could easily rise further. To boost the region's economic development and make attack on poverty, the government plans to asphalt(铺设沥青) and widen the BR-163 highway that slices the forest roughly in half, running from north to south. Though the government has been working with environmental groups and others to try to limit the scheme's impact, past experience has shown that improved road access invariably means more intrusion of the forest by loggers, ranchers, farmers, mineral prospectors and others. For much of Brazil's recent history, in particular during the country's 1964-85 military dictatorship, successive governments were obsessed(困扰) with populating and "developing" Amazonia, convinced that otherwise a foreign power might seize it. Large sums were spent building highways to open up the forest and a lot of subsidies were offered to get people to resettle there. However, the huge area of abandoned former forest land alongside previous road schemes show that, in fact, much of the region lacks suitable soil and climate for agriculture. More recent governments have taken the axe to the worse schemes that encouraged people to destroy the rainforest. Besides Brazil's tough conservation laws, there are now countl A．Y B．N C．NG

if（3＜2）{printf（"confirm"）;}else{printf（"return"）;}（） A．return B．onfirm C．onfirmreturn D．returnconfirm

A．以下都不正确 B．word C．txt D．excel