OP |
OB |
PA |
|
| ||
|
|
OP |
OB |
PA |
PA |
OA |
OP |
OP |
OA |
OB |
OP |
2t |
1+2t |
OA |
t |
1+2t |
OB |
AP |
PB |
AP |
PB |
1 |
1+m |
OP |
OA |
OB |
|
1 |
2 |
2 |
3 |
1 |
1+m |
1 |
2 |
|
| ||
|
|
1 |
2 |
1 |
2 |
AD |
DB |
CD |
CA |
CB |
a |
a |
b |
b |
A.{(1,-2)} | B.{(-13,-23)} | C.{(-2,1)} | D.{(-23,-13)} |
A.数轴上任意一个点的坐标有正负和大小,它是一个位移向量 | ||
B.两个相等的向量的起点可以不同 | ||
C.每一个实数都对应数轴上的唯一的一个位移向量 | ||
D.
|
a |
b |
c |
a |
b |
a |
b |
a |
. |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
c |
b |
c |
a |
b |
a |
b |
A.-2 | B.2 | C.0 | D.
|
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