A.2 | B.4 | C.6 | D.8 |
|PF1|2+|PF2|2-|F1F2|2 |
2|PF1||PF2| |
(|PF1|-|PF2|)2+2|PF1||PF2|-|F1F2|2 |
2|PF1||PF2| |
1 |
2 |
22+2|PF1||PF2|-(2
| ||
2|PF1||PF2| |
θ |
2 |
600 |
2 |
3 |
1 |
2 |
1 |
2 |
| ||
2 |
A.90° | B.120° | C.135° | D.150° |
7 |
A.2 | B.3 | C.2或3 | D.4 |
A.30° | B.60° | C.120° | D.150° |
A.30° | B.45° | C.60° | D.120° |
7 |
A.30° | B.45° | C.60° | D.120° |
© 2017-2019 超级试练试题库,All Rights Reserved.