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科目: 來源: 題型:單選題

已知

A. B. C. D.

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科目: 來源: 題型:單選題

已知向量,且,則實數(shù)的值為(    )

A. B. C. D. 

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科目: 來源: 題型:單選題

已知向量,若,則實數(shù)的取值范圍是(     )

A. B.
C. D.

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科目: 來源: 題型:單選題

若非零向量,滿足,且,則向量,的夾角為 (   )

A. B. C. D.

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科目: 來源: 題型:單選題

若向量和向量平行,則 (    )

A. B. C. D.

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科目: 來源: 題型:單選題

中,,,,則的值等于(    )

A. B. C. D. 

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科目: 來源: 題型:單選題

已知向量滿足,滿足,,若共線,則的最小值為(    。

A. B. C. D.

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科目: 來源: 題型:單選題

已知以為直徑的半圓,圓心為,為半圓上任意點,在線段上,則的最小值是(   )

A.B.C.D.

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科目: 來源: 題型:單選題

非零向量,,,若向量,則的最大值為(   )

A. B. C. D.以上均不對

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科目: 來源: 題型:單選題

已知,,點C在內(nèi), ,若=2m+m),則=(    )                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

A.1B.2C.D.4

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