在数据库系统的三级模式体系结构中,描述数据在数据库中的物理结构或存储方式的是 【10

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问题:

在数据库系统的三级模式体系结构中,描述数据在数据库中的物理结构或存储方式的是 【10】

考点:计算机等级考试数据库技术三级数据库技术笔试19
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校园网在进行IP地址部署时,给某基层单位分配了一个C类地址块192.168.110.0/24,该单位的计算机数量分布如表17-2所示。要求各部门处于不同的网段,请将表17-3中的(7)~(14)处空缺的主机地址(或范围)和子网掩码填写在答题纸的相应位置。

表17-2
部 门 主机数量
教师机房 100台
教研室A 32台
教研室B 20台
教研室C 25台
表17-3
部 门 可分配的地址范围 子网掩码
教师机房 192.168.110.1~ (7) (11)
教研室A (8) (12)
教研室B (9) (13)
教研室C (10) (14)

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男性,56岁,大便次数增加伴间断腹泻3个月,排脓血便20天,体重下降6kg。

为明确诊断,首先考虑为患者安排的检查是()。

A.纤维胃镜

B.纤维结肠镜

C.血液肿瘤标记物

D.大便潜血

E.粪便涂片找阿米巴滋养体

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A patrol team of sea lions and dolphins featured in a large-scale military exercises being conducted by the U. S. and its allies in the Pacific Ocean. The machine (1) took part in simulated mine recovery and mine detection missions during the biennial Rim of the Pacific Exercise (RIMPAC) war games. The (2) started on June 19 and will run (3) Friday.
"There are a number of mechanical systems that work in those areas. (4) high-tech gadgets deployed by the military can’t (5) the natural skills of dolphins and lions," said Tom Lapuzza, spokesman for UN Navy’s Marine Mammal Program. Sea lions have "incredible good underwater (6) " and can dive down to 300 meters to catch a recovery line to a mine, he said. Dolphins use sonar to (7) mine.
Human beings have a long (8) of training animals to join the military. Horses have been the most widely-used animals (9) the recorded history of (10) . In early times, horses were used to (11) chariots or to (12) armored forces. With the development of modem weapons and motorized (13) , the use of horses for military purposes fell into (14) . (15) , horses were still used (16) by the German army during World War II for transporting (17) and equipment, including artillery.
During World War II, (18) with explosives strapped to their backs were used as anti-tank weapons. In other (19) , they were used for detecting mines. Some dogs were also used as messengers.
Other animals have also (20) in the military. Recorded history shows the use of elephants for military purposes as early as 1,100 B. C.. They were employed during World War II by both the Japanese army and the (21) .
There are records showing that over 100,000 reindeer were used by Finland to tow sleds during World War II. They carried the (22) to hospitals, brought supplies to the troops and moved heavy anti-tank weapons. It is well documented that oxen have been (23) used in war as improvised beasts of burden. During World War II, spiders were employed by the Allies to spin silk for (24) in cross-hairs on bomb scopes and other optical instruments. People also are finding that Vampire bats’ ability to use echolocation is very interesting as we (25) to learn how it works and it may benefit the army.

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施测视距测量,当视线水平时,上丝读数1.00m,下丝读数为2.00m,则两点间水平距离为()

A.200m

B.100m

C.50m

D.20m

题型:填空题

对出灰工具有何要求?

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