假设<img src="https://static.zxtiku.com/wangke/imgs/topic/453065aa1aa3b91c5d44af07c5b3c2a3.png"/> ,<img src="https://static.zxtiku.com/wangke/imgs/topic/3989b041ee55ef0ae85492cf09d002b4.png"/> ,<img src="https://static.zxtiku.com/wangke/imgs/topic/bf126518af00eabbaa28310ca9ecfabc.png"/> ,那么,下面说法中,()是正确的