题目内容
（请给出正确答案）
A.To reject all traffic unless it is explicitly permitted
B.To accept all traffic unless it is explicitly rejected
C.To enable all internal interfaces
D.To enable all external interfaces
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更多“What is the most secure policy…”相关的问题
What type(s) of control-Newfoundland, occurrence, or feedback-do you think would have been most useful in this sinusoidal？ Explain your choice(s).
A.Noone can help me
B.It must be the job I like
C.I have so many friends
D.I won’t choose it
A.what
B.was
C.to eat
D.to live
A.that
B.why
C.what
D.which
A.To illustrate we should commit ourselves and start acting
B.To illustrate our dreams don’t have to be grand to be great
C.To illustrate her dream was to be the friendliest and most helpful salesperson
D.To illustrate we all have the power to follow a dream
The "rolling wave" or "moving window" concept is used most frequently on projects where:
AThe baseline is frozen for the duration of the project and no scope changes are permitted
BMarketing is unsure of what the customer actually wants and reserves the right to make major scope changes
CThe low levels of the work breakdown structure are known with certainty for the next three to six months, but the remaining tasks are based upon the results of the first three to six months of work
DNetworking techniques are not appropriate
EAll of the above
165 Lessons learned are most often based upon project historical records. Lessons learned can be used to:
A. See what mistakes others have made
B. See how others have solved problems
C. Predict trends, highlight problems and identify alternatives
D. All of the above
E. A and B only
ASee what mistakes others have made
BSee how others have solved problems
CPredict trends, highlight problems and identify alternatives
DAll of the above
EA and B only
“Energy independence” and its rhetorical (修辞的) companion “energy security” are, however, slippery concepts that are rarely though through. What is it we want independence from, exactly？
Most people would probably say that they want to be independent from imported oil. But there are reasons that we buy all that old from elsewhere.
The first reason is that we need it to keep our economy running. Yes, there is a trickle(涓涓细流)of biofuel(生物燃料)available, and more may become available, but most biofuels cause economic waste and environmental destruction.
Second, Americans have basically decided that they don't really want to produce all their own oil. They value the environmental quality they preserve over their oil imports from abroad. Vast areas of the United States are off-limits to oil exploration and production in the name of environmental protection. To what extent are Americans really willing to endure the environmental impacts of domestic energy production in order to cut back imports？
Third, there are benefits to trade. It allows for economic efficiency, and when we buy things from places that have lower production costs than we do, we benefit. And although you don't read about this much, the United States is also a large exporter of oil products, selling about 2 million barrels of petroleum products per day to about 90 countries.
There is no question that the United States imports a great deal of energy and, in fact, relies on that steady flow to maintain its economy. When that flow is interrupted, we feel the pain in short supplies and higher prices, At the same time, we derive massive economic benefits when we buy the most affordable energy on the world market and when we engage in energy trade around the world.
61. What does the author say about energy independence for America？()
A.It sounds very attractive.
B.It ensures national security.
C.It will bring oil prices down.
D.t has long been everyone's dream.
62. What does the author think of biofuels？()
A.They keep America's economy running healthily.
B.They prove to be a good alternative to petroleum.
C.They do not provide a sustainable energy supply.
D.They cause serious damage to the environment.
63. Why does America rely heavily on oil imports？()
A.It wants to expand its storage of crude oil.
B.Its own oil reserves are quickly running out.
C.It wants to keep its own environment intact.
D.Its own oil production falls short of demand.
64. What does the author say about oil trade？()
A.It proves profitable to both sides.
B.It improves economic efficiency.
C.It makes for economic prosperity.
D.It saves the cost of oil exploration.
65. What is the author's purpose in writing the passage？()
A.To justify America's dependence on oil imports.
B.To arouse Americans' awareness of the energy crisis.
C.To stress the importance of energy conservation.
D.To explain the increase of international oil trade.
