A. Bye!
B. OK! I like red.
C. Nice to meet you.
D. Good morning, Tom,
E. Nice to meet you, too.
如图,四棱锥P﹣ABCD中,底面ABCD为菱形,PA⊥底面ABCD, AC=22 ,PA=2,E是PC上的一点,PE=2EC.