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Anhui mathematics college entrance examination questions
Answer:

The emphasis is PQ//AM (the properties of parallel surfaces).

(3)

The same is the nature of parallel planes,

Associated Press//Sir

(4)

PQ//AM

3/4 & lt; CQ< 1,

M is on A 1D 1,

Same as (3)R on C 1D 1

The cross section is APQRM, which is pentagonal.