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【单选题】
According to paragraph 2, which of the following led some early researchers to believe that the Pacific islanders originally came from Egypt? READ THE PASSAG E. THEN ANSWER THE QUESTIONS. GIVE YOURSELF 20 MINUTES TO COMPLETE THIS PRACTICE SET. THE ORIGIN OF THE PACIFIC ISLAND PEOPLE THE GREATER PACIFIC REGION, TRADITIONALLY CALLED OCEANIA, CONSISTS OF THREE CULTURAL AREAS: MELANESIA, MICRONESIA, AND POLYNESIA. MELANESIA, IN THE SOUTHWEST PACIFIC, CONTAINS THE LARGE ISLANDS OF NEW GUINEA, THE SOLOMONS, VANUATU, AND NEW CALEDONIA. MICRONESIA, THE AREA NORTH OF MELANESIA, CONSISTS PRIMARILY OF SMALL SCATTERED ISLANDS. POLYNESIA IS THE CENTRAL PACIFIC AREA IN THE GREAT TRIANGLE DEFINED BY HAWAII, EASTER ISLAND, AND NEW ZEALAN D. BEFORE THE ARRIVAL OF EUROPEANS, THE ISLANDS IN THE TWO LARGEST CULTURAL AREAS, POLYNESIA AND MICRONESIA, TOGETHER CONTAINED A POPULATION ESTIMATED AT 700,000. SPECULATION ON THE ORIGIN OF THESE PACIFIC ISLANDERS BEGAN AS SOON AS OUTSIDERS ENCOUNTERED THEM; IN THE ABSENCE OF SOLID LINGUISTIC, ARCHAEOLOGICAL, AND BIOLOGICAL DATA, MANY FANCIFUL AND MUTUALLY EXCLUSIVE THEORIES WERE DEVISE D. PACIFIC ISLANDERS WERE VARIOUSLY THOUGHT TO HAVE COME FROM NORTH AMERICA, SOUTH AMERICA, EGYPT, ISRAEL, AND INDIA, AS WELL AS SOUTHEAST ASIA. MANY OLDER THEORIES IMPLICITLY DEPRECATED THE NAVIGATIONAL ABILITIES AND OVERALL CULTURAL CREATIVITY OF THE PACIFIC ISLANDERS. FOR EXAMPLE, BRITISH ANTHROPOLOGISTS G. ELLIOT SMITH AND W. J. PERRY ASSUMED THAT ONLY EGYPTIANS WOULD HAVE BEEN SKILLED ENOUGH TO NAVIGATE AND COLONIZE THE PACIFI C. THEY INFERRED THAT THE EGYPTIANS EVEN CROSSED THE PACIFIC TO FOUND THE GREAT CIVILIZATIONS OF THE NEW WORLD(NORTH AND SOUTH AMERICA). IN 1947 NORWEGIAN ADVENTURER THOR HEYERDAHL DRIFTED ON A BALSA-LOG RAFT WESTWARD WITH THE WINDS AND CURRENTS ACROSS THE PACIFIC FROM SOUTH AMERICA TO PROVE HIS THEORY THAT PACIFIC ISLANDERS WERE NATIVE AMERICANS(ALSO CALLED AMERICAN INDIANS). LATER HEYERDAHL SUGGESTED THAT THE PACIFIC WAS PEOPLED BY THREE MIGRATIONS: BY NATIVE AMERICANS FROM THE PACIFIC NORTHWEST OF NORTH AMERICA DRIFTING TO HAWAII, BY PERUVIANS DRIFTING TO EASTER ISLAND, AND BY MELANESIANS. IN 1969 HE CROSSED THE ATLANTIC IN AN EGYPTIAN-STYLE. REED BOAT TO PROVE EGYPTIAN INFLUENCES IN THE AMERICAS. CONTRARY TO THESE THEORISTS, THE OVERWHELMING EVIDENCE OF PHYSICAL ANTHROPOLOGY, LINGUISTICS, AND ARCHAEOLOGY SHOWS THAT THE PACIFIC ISLANDERS CAME FROM SOUTHEAST ASIA AND WERE SKILLED ENOUGH AS NAVIGATORS TO SAIL AGAINST THE PREVAILING WINDS AND CURRENTS. THE BASIC CULTURAL REQUIREMENTS FOR THE SUCCESSFUL COLONIZATION OF THE PACIFIC ISLANDS INCLUDE THE APPROPRIATE BOAT-BUILDING, SAILING, AND NAVIGATION SKILLS TO GET TO THE ISLANDS IN THE FIRST PLACE; DOMESTICATED PLANTS AND GARDENING SKILLS SUITED TO OFTEN MARGINAL CONDITIONS; AND A VARIED INVENTORY OF FISHING IMPLEMENTS AND TECHNIQUES. IT IS NOW GENERALLY BELIEVED THAT THESE PREREQUISITES ORIGINATED WITH PEOPLES SPEAKING AUSTRONESIAN LANGUAGES(A GROUP OF SEVERAL HUNDRED RELATED LANGUAGES)AND BEGAN TO EMERGE IN SOUTHEAST ASIA BY ABOUT 5000
C.
C. E. THE CULTURE OF THAT TIME, BASED ON ARCHAEOLOGY AND LINGUISTIC RECONSTRUCTION, IS ASSUMED TO HAVE HAD A BROAD INVENTORY OF CULTIVATED PLANTS INCLUDING TARO, YAMS, BANANA, SUGARCANE, BREADFRUIT, COCONUT, SAGO, AND RIC E. JUST AS IMPORTANT, THE CULTURE ALSO POSSESSED THE BASIC FOUNDATION FOR AN EFFECTIVE MARITIME ADAPTATION, INCLUDING OUTRIGGER CANOES AND A VARIETY OF FISHING TECHNIQUES THAT COULD BE EFFECTIVE FOR OVERSEAS VOYAGIN G. CONTRARY TO THE ARGUMENTS OF SOME THAT MUCH OF THE PACIFIC WAS SETTLED BY POLYNESIANS ACCIDENTALLY MAROONED AFTER BEING LOST AND ADRIFT, IT SEEMS REASONABLE THAT THIS FEAT WAS ACCOMPLISHED BY DELIBERATE COLONIZATION EXPEDITIONS THAT SET OUT FULLY STOCKED WITH FOOD AND DOMESTICATED PLANTS AND ANIMALS. DETAILED STUDIES OF THE WINDS AND CURRENTS USING COMPUTER SIMULATIONS SUGGEST THAT DRIFTING CANOES WOULD HAVE BEEN A MOST UNLIKELY MEANS OF COLONIZING THE PACIFI C. THESE EXPEDITIONS WERE LIKELY DRIVEN BY POPULATION GROWTH AND POLITICAL DYNAMICS ON THE HOME ISLANDS, AS WELL AS THE CHALLENGE AND EXCITEMENT OF EXPLORING UNKNOWN WATERS. BECAUSE ALL POLYNESIANS, MICRONESIANS, AND MANY MELANESIANS SPEAK AUSTRONESIAN LANGUAGES AND GROW CROPS DERIVED FROM SOUTHEAST ASIA, ALL THESE PEOPLES MOST CERTAINLY DERIVED FROM THAT REGION AND NOT THE NEW WORLD OR ELSEWHER E. THE UNDISPUTED PRE-COLUMBIAN PRESENCE IN OCEANIA OF THE SWEET POTATO, WHICH IS A NEW WORLD DOMESTICATE, HAS SOMETIMES BEEN USED TO SUPPORT HEYERDAHL'S 'AMERICAN INDIANS IN THE PACIFIC' THEORIES. HOWEVER, THIS IS ONE PLANT OUT OF A LONG LIST OF SOUTHEAST ASIAN DOMESTICATES. AS PATRICK KIRCH, AN AMERICAN ANTHROPOLOGIST, POINTS OUT, RATHER THAN BEING BROUGHT BY RAFTING SOUTH AMERICANS, SWEET POTATOES MIGHT JUST HAVE EASILY BEEN BROUGHT BACK BY RETURNING POLYNESIAN NAVIGATORS WHO COULD HAVE REACHED THE WEST COAST OF SOUTH AMERICA. DIRECTIONS: NOW ANSWER THE QUESTIONS. THE GREATER PACIFIC REGION, TRADITIONALLY CALLED OCEANIA, CONSISTS OF THREE CULTURAL AREAS: MELANESIA, MICRONESIA, AND POLYNESIA. MELANESIA, IN THE SOUTHWEST PACIFIC, CONTAINS THE LARGE ISLANDS OF NEW GUINEA, THE SOLOMONS, VANUATU, AND NEW CALEDONIA. MICRONESIA, THE AREA NORTH OF MELANESIA, CONSISTS PRIMARILY OF SMALL SCATTERED ISLANDS. POLYNESIA IS THE CENTRAL PACIFIC AREA IN THE GREAT TRIANGLE DEFINED BY HAWAII, EASTER ISLAND, AND NEW ZEALAN
D.
BEFORE THE ARRIVAL OF EUROPEANS, THE ISLANDS IN THE TWO LARGEST CULTURAL AREAS, POLYNESIA AND MICRONESIA, TOGETHER CONTAINED A POPULATION ESTIMATED AT 700,000.
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【单选题】导向系统是用来监视盾构精确姿态,提供盾构相对于 的详细偏差信息,便于用户及时纠正盾构的姿态。
A.
盾构设计轴线
B.
隧道设计轴线
C.
隧道设计曲线
D.
隧道线路轴线
【单选题】在色谱分析中,分离度R 可作为色谱柱分离效能的指标。从理论上可以证明,当R达到下列哪个数值时,可以判断相邻两色谱峰已完全分离
A.
0.5
B.
0.8
C.
1.0
D.
1.5
E.
2.0
【单选题】“肩膀上的太阳”规则,其大意是说户外拍摄人物时,被摄者应该()对太阳。
A.
B.
C.
D.
【简答题】如图所示电路,已知Z 1 =(20+j15)Ω,Z 2 =(5-j15)Ω,外施正弦电压的有效值为220V。求(1) 和 ;(2)各负载及全电路的有功功率P、无功功率Q、视在功率S和功率因数cosφ。
【简答题】看图完成该零件的精加工程序,即完成该零件的轮廓加工程序编制。
【简答题】如图所示电路,调节R可使 与 相位差为90°,已知Z 1 =(5+j12)Ω,Z 2 =(10+j18)Ω,求R的值。
【判断题】导向系统是用来监视盾构精确姿态,提供盾构相对于隧道设计轴线的详细偏差信息,便于用户及时纠正盾构的姿态。
A.
正确
B.
错误
【单选题】找工作之前,你最好做个兼职来增加一些社会经验。
A.
In front of hunting for a job, you’d better do a part-time job to add social experience.
B.
Before hunting for a job, you‘d better do a part-time job to add social experience.
C.
Before looking a job, you’d better do a free-time job to add social experience.
D.
In front of looking a job, you’d better do a part-time job to add social experience.
【简答题】基础 是指基础底面至地面(这里指天然地面)的距离,选择基础埋置深度也即选择合适的 。
【单选题】在色谱分析中,R =1.0时:两峰的分离程度达到
A.
89%;
B.
98%;
C.
99.7%;
D.
100%。
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