— . The old man who sat here will be back soon.
A:You're welcome.
B:Yes, please.
C:You'd better not.
D:No problem.
若双曲线x23﹣16y2p2=1的左焦点在抛物线y2=2px的准线上,则p的值为____
下列各式的变形,能正确运用等式的性质的是( )