According to the passage, which of the following is NOT true of the statement that time still shapes our world and should not be ignored?
A. Time sickness contributes to heart disease and strokes.
B. A squirrel knows when to prepare for its long winter hibernation.
C. Life is tightly scheduled in North America.
D. Light is the most powerful synchronizer in most living things.
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如题图所示电路,已知uS(t)=10cos100πt+2cos300πt(V),uO(t)=2cos300πt(V),C=9.4μF,求L1和L2的值。
What is the largest public library in the United States?
A. The library of Harvard College.
B. The Library of Congress.
C. The library in Philadelphia.
D. The library in New England.
The word clash in Paragraph 8 is closest in meaning to______.
A. quarrel
B. conflict
C. crash
D. shock
What is the purpose of the most recent guidelines made by the ITF?
A. To eliminate the use of smart rackets.
B. To stop the development of high tech equipment.
C. To encourage fair competition.
D. To encourage the use of smart rackets.