设 <img src="https://zk.995w.com/lqwvjeImg/dc/dc6ddc51e1bfd91fd6ab313a9aa91a3c.png"style="width:48px;height:34px;"> 为非零向量,则<img src="https://zk.995w.com/lqwvjeImg/a8/a841d4a5a356f0d5e24f9006c3fcca32.png"style="width:67px;height:31px;">是( ).<br>· <img src="https://zk.995w.com/lqwvjeImg/0b/0b2b56f60f70e86f5a783a14be8cbdc1.png"style="width:55px;height:32px;">的充要条件<br>· <img src="https://zk.995w.com/lqwvjeImg/6b/6b9d52730bdc505508650f9a4e62b519.png"style="width:39px;height:25px;">的充要条件<br>· <img src="https://zk.995w.com/lqwvjeImg/a6/a6b67e72ff8c72bfbde9d7e1f8b26a11.png"style="width:46px;height:26px;">的充要条件<br>· <img src="https://zk.995w.com/lqwvjeImg/98/98e4a9cb5c7fd5b93d463e4513521b24.png"style="width:45px;height:28px;">的必要但不充分条件