A:Do you like meat?
B:Do you like noodles?
(Ⅰ)证明:平面PAD⊥平面ABFE;
(Ⅱ)求正四棱锥P﹣ABCD的高h,使得二面角C﹣AF﹣P的余弦值是 223 .
读拼音,写词语。
sǎng zi
yǎn kuàng
yān xūn huǒ liǎo
xiè chē
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