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【简答题】
高度为K的完全二至少有——个叶子结点。【合肥工业大学1999二、6(2分)】
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举一反三
【单选题】在用反相HPLC法分离测定B族维生素时,常加入己烷磺酸钠,其目的是
A.
调节溶液的pH，使样品充分游离
B.
与B族维生素反应，生成离子对，易于被色谱柱保留
C.
防止样品被氧化
D.
络合样品中微量的金属离子
E.
提高分离度
【单选题】听力原文： In a statement, President Bush says he is taking the action, because the conflict in Darfur threatens the national security and foreign policy of the United States. The asset freeze is being imp...
A.
The asset freeze is being imposed on four Sudanese.
B.
The conflict in Darfur threatens the national security and foreign policy of the United States.
C.
Rallies axe planned in Washington and throughout the US to protest the four-year war in Darfur.
D.
George Clooney just returned from a trip to the Darfur region.
【单选题】在用反相HPLC法分离测定B族维生素时常加入己磺酸钠,其目的是
A.
调节溶液的PH值，使样品充分游离
B.
与样品离子反应生成离子对，改善色谱行为
C.
防止样品被氧化
D.
络合样品中微量的金属离子
E.
抑制B族维生素电离
【单选题】The author would most likely agree with which of the following descriptions of the conflict between Darwinists and cultural anthropologists over the nature of animal emotions?
A.
The concept of animal emotions suggests that human emotions are based on instinctual biology.
B.
Cultural relativists dispute the notion that animal emotions are innate and not be learned.
C.
Darwinists view the events of the twentieth-century as a triumph of animal instinct over rational human behavior.
D.
Darwinists wish to draw a line between emotional behavior. and culturally acquired behavior.
E.
Cultural relativists support the idea of an animal behavior. dictated by behavioral rules.
【单选题】Jack Kerouac was neither a demon nor a saint but a ______ , notably gentle, deeply conflicted and finally self-destructive person whose dream from childhood was to be a writer.
A.
muse
B.
martyr
C.
cadge
D.
fallible
E.
ascetic
【简答题】MDY({^1999-12-30})，显示结果为______。
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