配套习题- 向量中的易混概念 -【青果学院】

1/3单选题

难度：

1.

已知是平面向量，下列命题中真命题的个数是（）

①

②
③

④

A	1
B	2
C	3
D	4

正确答案：QQ==

PHA+55Sx5bmz6Z2i5ZCR6YeP55qE5Z+656GA55+l6K+G5Y+v55+l4pGg4pGh4pGj5Z2H5LiN5q2j56Gu77yM5Y+q5pyJ4pGi5q2j56Gu77yM5pWF6YCJPGJyPjwvcD4=

2/3单选题

难度：

2.下列命题正确的是( )

A	单位向量都相等
B	若与共线，与共线，则与共线
C	若，则
D	若与都是单位向量，则

正确答案：Qw==

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

3/3单选题

难度：

3.

向量a、b都是非零向量，下列说法不正确的是（ )

A	向量a与向量b同向，则向量a＋b与a的方向相同
B	向量a与b同向，则向量a＋b与b的方向相同
C	向量a与b反向，且\|a\|<\|b\|，则向量a＋b与a的方向相同
D	向量a与b反向，且\|a\|>\|b\|，则向量a＋b与a的方向相同

正确答案：Qw==

PHA+6IulYe+8jGLlkIzlkJHvvIzliJlh77yLYuS4jmHlkIzlkJHvvIzkuZ/kuI5i5ZCM5ZCR77yM5pWFQeOAgULmraPnoa7vvI7oi6Vh5LiOYuWPjeWQke+8jOeUsXxhfOS4jnxifOeahOWkp+Wwj+WPr+WIpOaWrUPplJnor6/vvI48L3A+