题目内容
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The(70)provides the project manager with the authority to apply organizational resources to project activities．
A．project management plan
B．contract
C．project human resource plan
D．project charter
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●Applications put computers to practical business (67) ，but below the (68) it's the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program，connect to networks and store (69) ．
A traditional kernel provides all the functions for applications．The kernel (70) memory，I／O devices and parcels out processor time．
The kernel also supports security and fault (71) ，which is the ability to recover automatically when parts of the system fail．
(67) A．used
B．use
C．apply
D．applied
(68) A．earth
B．bottom
C．table
D．surface
(69) A．graphics
B．data
C．text
D．image
(70) A．manages
B．manage
C．managed
D．managing
(71) A．error
B．question
C．tolerance
D．problem
Applications put computers to practical business(67), but below the(68)it's the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program, connect to networks and store(69).
A traditional kernel provides all the functions for applications. The kernel(70)memory, I/0 devices and parcels out processor time.
The kernel also supports security and fault(71), which is the ability to recover automatically when parts of the system fail.
A．used
B．use
C．apply
D．applied
Most computer systems are(66)to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be(67)to an outsider attack by preventing(68)from outside can still be vulnerable to the insider attacks accomplished by abusive usage of(69)users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually(70)by tools referred to as Intrusion Detection Systems.
A．vulnerable
B．week
C．sensitively
D．helpless
Estimating schedule activity costs involves developing an(69)of the costs of the resources needed to complete each schedule activity. Cost estimating includes identifying and considering various costing alternatives. For example, in most application areas, additional work during a design phase is widely held to have the potential for reducing the cost of the execution phase and product operations. The cost estimating process considers whether the expected savings can offset the cost of the additional design work. Cost estimates are generally expressed in units of(70)to facilitate comparisons both within and across projects.The(71 )describes the business need, justification, requirements, and current boundaries for the project. It provides important information about project requirements that is considered during cost estimating.
A．accuracy
B．approximation
C．specification
D．summary
Much of the energy that comes from the sun never reaches the earth's surface. It is either reflected or absorbed by the gases in the upper atmosphere. Of the energy that reaches the lower atmosphere, 30% is reflected by clouds or the earth's surface. The remaining 70% warms the surface of the planet, causes water to evaporate, and provides energy for the water cycle and weather. Only a tiny part, approximately 0.023%, is actually used by green plants to produce food.
Many gases found in the atmosphere actually reflect heat energy escaping from the earth's surface back to the earth. These gases act like the glass of a greenhouse in that they allow energy from the sun to enter but prevent energy form. leaving. They are therefore called greenhouse gases.
When sunlight strikes an object, some of the energy is absorbed and some is reflected. The amount reflected depends on the surface. Dark-colored surfaces, such as dark soil or forest, absorb more energy.
According to the passage, the root cause for weather changes on the earth is
A．the atmosphere surrounding the earth
B．water from oceans and lakes
C．energy from the sun
D．greenhouse gases in the sky
(66) is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication．
(67) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols．
(68) functions with two layers of protocols．It Can connect networks of different speeds and can be adapted to an environment as it expands．
(69) is the popular LAN developed under the direction of the IEEE 802．5．
(70) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI．
(66) A．The MAC address
B．The IP address
C．The subnet address
D．The virtual address
(67) A．ISO
B．ANSI
C．CCITT
D．IEEE
(68) A．The hub
B．The bridge
C．The router
D．The proxy
(69) A．Ethernet
B．Token Bus
C．Token Ring
D．DQDB
(70) A．X．25
B．ATM
C．FDDI
D．SMDS
A．choice
B．read
C．important
D．software
E．hardware
The kernel is the(66)of an operating system such as Windows98, Windows NT, Mac OS or Unix. The kernel provides basic services for the other parts of the operating system,(67)it possible for it to run several programs at once(multitasking), read and write files and connect to networks and peripherals. Applications and utility programs use the services provided by the kernel to provide practical business functionality.
In operating systems such as Windows or most versions of Unix, the kernel(68)everything except application and utility programs.
In microkernel operating systems such as Digital Unix and Apples forthcoming Mac OS Server, the kernel(69)supports only multitasking and memory management. Other services such as applications, utilities and the user interface support device drivers, API and graphics which all(70)outside the microkernel.
A．nucleus
B．center
C．core
D．heart
根据以下材料回答题
We experience different forms of the sun' s energy every day．The sun is the major source ofenergy for our planet．It causes the evaporation (蒸发) of water from the oceans and lakes．Sun-light also provides the energy used by green plants to make their own food．
Much of the energy that comes from the sun never reaches the earth' s surface．It is either re-fleeted or absorbed by the gases in the upper atmosphere．Of the energy that reaches the lower at-mosphere, 30% is reflected by clouds or the earth' s surface．The remaining 70% warms the surfaceof the planet, causes water to evaporate, and provides energy for the water cycle and weather．
Only a tiny part, approximately 0．023%, is actually used by green plants to produce food．
Many gases found in the atmosphere actually reflect heat energy escaping from the earth' s sur-face back to the earth．These gases act like the glass of a greenhouse in that they allow energy fromthe sun to enter but prevent energy form. leaving．They are therefore called greenhouse gases．
When sunlight strikes an object, some of the energy is absorbed and some is reflected．Theamount reflected depends on the surface．Dark-colored surfaces, such as dark soil or forest, absorbmore energy．
According to the passage， the root cause for weather changes on the earth is __________． 查看材料
A.the atmosphere surrounding the earth
B.water from oceans and lakes
C.energy from the sun
D.greenhouse gases in the sky
Much of the energy that comes from the Sun never reaches the Earth's surface. It is either reflected or absorbed by the gases in the upper atmosphere. Of the energy that reaches the lower atmosphere, 30% is reflected by clouds or the Earth's surface. The remaining 70% warms the surface of the planet, causes water to evaporate, and provides energy for the water cycle and weather. Only a tiny part, approximately 0.023%, is actually used by green plants to produce food.
Many gases found in the atmosphere actually reflect heat energy escaping from the Earth's surface back to the Earth. These gases act like the glass of a greenhouse in that they allow energy from the Sun to enter but prevent energy from leaving. They are therefore called greenhouse gases.
When sunlight strikes an object, some of the energy is absorbed and some is reflected. The amount reflected depends on the surface. For example, you've probably noticed how bright snow is when sunlight falls on it. Snow reflects most of the energy from the Sun, so it contributes to the low temperatures of winter. Dark-colored surfaces, such as dark soil or forest, absorb more energy and help warm the surrounding air.
What is the major source of evaporation of water from the oceans and lakes？
A．The moon.
B．The sun.
C．The star.
D．The earth.
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