自然界中存在着多种形式的能，下面对能的叙述中不正确的是（ ）
She doesn't want to see anyone now. She just wants to be left a____.
直线l1：2x﹣y﹣1=0与直线l2：mx+4y+2=0互相平行的充要条件是（ ）
— People are crazy! experts say there is no use eating salt to prevent radiation(辐射), some people still don't believe it.
