How many more decades will have to pass ______ scientists su

An architectural Style defines as a family of such systems in terms of a （ ）of structural organization. More specifically an architectural style defines a vocabulary of（ ） and connector types, and a set of（ ）on how they can be combined. For many styles there may also exist one or more （ ） that specify how to determine a system's overall properties from the properties of its parts. Many of architectural styles have been developed over the years. The best-known examples of （请作答此空）architectures are programs written in the Unix shell．

A.event-based
B.object-oriented
C.pipe-and-filter
D.layered

Every year gray whales migrate from the Bering Sea in Alaska to the Baja Peninsula in Mexico.
Eleven gray whales have died in the San Francisco Bay in the last three weeks．No one knows why the whales are dying.
Last year 270 whales died along the whales'migration route．Many people think starvation is the cause．This year the dead whales seem to have more blubber(fat)on them.
Twenty years ago,the gray whale was listed as an endangered species.
Some scientists think that the larger number of whales makes it hard to find enough food．More whales create more pressure on the food supply,a supply that some scientists say may have dwindled as a result of the warm waters of El Nino.
Most of the whales have been dead for many days before they are found and studied．This makes it hard to find the reason for death.
65 whales have been seen in the San Francisco Bay Area this year compared to 17 last year．The whales could be dying from many diseases,but it may be over-population．

Which of the following is NOT a possible reason for whales dying?

A.Pneumoni
B.Brain infectio
C.Over-populatio
D.Over-eatin

Every year gray whales migrate from the Bering Sea in Alaska to the Baja Peninsula in Mexico.
Eleven gray whales have died in the San Francisco Bay in the last three weeks．No one knows why the whales are dying.
Last year 270 whales died along the whales'migration route．Many people think starvation is the cause．This year the dead whales seem to have more blubber(fat)on them.
Twenty years ago,the gray whale was listed as an endangered species.
Some scientists think that the larger number of whales makes it hard to find enough food．More whales create more pressure on the food supply,a supply that some scientists say may have dwindled as a result of the warm waters of El Nino.
Most of the whales have been dead for many days before they are found and studied．This makes it hard to find the reason for death.
65 whales have been seen in the San Francisco Bay Area this year compared to 17 last year．The whales could be dying from many diseases,but it may be over-population．

About how many more whales have been sighted in the San Francisco Bay this year compared to last year?

A.Twice as man
B.Three times as man
C.Half as man
D.About the sam

An architectural Style defines as a family of such systems in terms of a （ ）of structural organization. More specifically an architectural style defines a vocabulary of（ ） and connector types, and a set of（ ）on how they can be combined. For many styles there may also exist one or more （请作答此空） that specify how to determine a system's overall properties from the properties of its parts. Many of architectural styles have been developed over the years. The best-known examples of （ ）architectures are programs written in the Unix shell．

A.semantic models
B.weak entities
C.data schemas
D.business models