(2016•福州)分解因式:x2﹣4=____.
Thanks to the new policy, a new modern school in our village last year.
用新鲜、成熟的天竺葵叶片作实验材料进行实验,以下叙述正确的是
— People are crazy! experts say there is no use eating salt to prevent radiation(辐射), some people still don't believe it.