At the moment the second plane was slamming into the south tower, President Bush was (1)_____ to the second-graders of Emma E. Booker Elementary in Sarasota FTA. When he arrived at the school he had been whisked (2)_____ a holding room: National Security Advisor Condoleezza Rice needed to (3)_____ to him. But he soon appeared in the classroom and listened (4)_____ as the children went through their reading drill. As he was getting ready to pose (5)_____ pictures with the teachers and kids, chief of staff Andy Card entered the room, walked (6)_____ to the President and whispered in Ms right ear. The President"s face became (7)_____ tense and serious. (8)_____ nodded, Card left and for several minutes the President seemed distracted and somber but then he (9)_____ his interaction with the class. "Really good readers, whew!" he told (10)_____ "These must be six-graders!" Meanwhile, in the room (11)_____ Bush was scheduled to give his remarks, about 200,people, (12)_____ local officials, school personnel and students, waited under the hot lights., Word of the crash began to (13)_____ reporters called their editors, but details were sparse until someone (14)_____ there was a TV in a nearby office. The President finally entered, about 35 minutes later, and (15)_____ his brief comments. "This is a (16)_____ time for America," he began. He ordered a massive (17)_____ to "hunt down the folks (18)_____ committed this act." Meanwhile the bomb dogs took a few extra passes through Air Force One, and an extra fighter escort was added. (19)_____ the President too was going to have trouble (20)_____ home.
A. to introduce
B. introduced
C. introducing
D. being introduced
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The energy crisis, which is being felt around the world, has dramatized how the careless use of the earth"s resources has brought the whole world to the brink of disaster. The over-development of motor transport, with its increase of more cars, more highways, more pollution, more suburbs, more commuting, has contributed to the near-destruction of our cities, the breakup of the family, and the pollution not only of local air but also of the earth"s atmosphere. The disaster has arrived in the form of the energy crisis. Our present situation is unlike war, revolution or depression. It is also unlike the great natural disasters of the past. Worldwide resources exploitation and energy use have brought us to a state where long-range planning is essential. What we need is not a continuation of our present serious state, which endangers the future of our country, our children, and our earth, but a movement forward to a new norm in order to work rapidly and effectively on planetary problems. This country has been falling back under the continuing exposures of loss morality and the revelation that lawbreaking has reached into the highest places in the land. There is a strong demand for moral revival and for some devotion that is vast enough and yet personal enough to enlist the devotion of all. In the past it has been only in a way in defense of their own country and their own ideals that people have been able to devote themselves wholeheartedly. This is the first time that we have been asked to defend ourselves and what we hold dear in cooperation with all the other inhabitants of this planet, who share with us the same endangered air and the same endangered oceans. There is a common need to reassess our present course, to change that course and to devise new methods through which the world can survive. This is a priceless opportunity. To grasp it we need a widespread understanding of nature if the crisis confronting us and the world is no passing inconvenience, no byproduct of the ambitions of the oil-producing countries, no environmentalists" mere fears, no byproduct of any present system of government. What we face is the outcome of the invention of the last four hundred years. What we need is a transformed life style. This new life style can flow directly from science and technology, but its acceptance depends on a sincere devotion to finding a higher quality of life for the world"s children and future generation. The author wrote the passage in order to
A. call for cooperation of the whole world.
B. inform the readers of the fact that we are facing energy crisis.
C. recommend a new life style.
D. call for devotion to the nature and our future generation.
若采用链地址法构造散列表,散列函数为H(key)=key MOD 17,则需((1))个链表。这些链的链首指针构成一个指针数组,数组的下标范围为((2))。【南京理工大学1995一、12(13)(4分)】 (1)
A. 17
B. 13
C. 16
D. 任意
查找低效的数据结构是( )。【中国科学院2006】
A. 有序顺序表
B. 二叉排序树
C. 堆
D. 平衡的二叉排序树
关于杂凑查找说法不正确的有几个 ( )【南京理工大学2000一、16(1.5分)】(1)采用链地址法解决冲突时,查找一个元素的时间是相同的(2)采用链地址法解决冲突时,若插入规定总是在链首,则插入任一个元素的时间是相同的 (3)用链地址法解决冲突易引起聚集现象(4)再哈希法不易产生聚集
A. 1
B. 2
C. 3
D. 4