题目内容

-1-i的主辐角是()

A. Π/4
B. -Π/4
C. 3Π/4
D. -3Π/4

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1+根号3i的三角表示为().

A. cos(Π/3)+isin(Π/3)
B. cos(Π/3)-isin(Π/3)
C. 2[cos(Π/3)+isin(Π/3)]
D. 2[cos(Π/3)-isin(Π/3)]

填空题:排列23154的逆序数为____

B3U3 Word buildingFill in the blanks with the newly-formed words in the box. Change the form where necessary. Each word can be used only once.generalize normalize publicize minimizeimmunize mobilize investor dictatorconqueror investigator moderator elevate1. I think it'll be interesting to see what she does to overcome those problems and tothe relations between the two countries.2. For each debate group, two students select the affirmative position, two select the negative, and the fifth serves as .3. If parents decide not to have their child, they are responsible for keeping their child as healthy as possible.4. If the pound's value is high, Britishwill spend their money abroad because the pound will buy them more.5. With your help today, we can begin tothe resources necessary to communicate to all of them on a regular and ongoing basis.6. A(n)always thinks his own customs are best, and he imposes them on the conquered.7. Over the years I'd found that the best way tomy spirit was to get involved in physical training.8. She oftenher findings with the help of journalists and policymakers who know she's a good, reliable source.9. Thehas carried out some research in the field before, so interpreting newly available material is not so difficult for him.10. In these companies, enlightened management has begun to treat workers as assets to be cultivated, rather than merely as costs to be .11. When you teach our kids not to integrate, not to, not to see connections, you are destroying their capacity to think.12. NaziAdolf Hitler's evil ambition brought the world closer to the brink of disaster than at any other time in the whole millennium (一千年).

1917年发表在“新青年”杂志上的著名体育论文《体育之研究》的作者是()。

A. 蔡元培
B. 张伯芩
C. 周恩来
D. 毛泽东

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