After of which is the APU access door and APU exhaust.

After of which is the APU access door and APU exhaust.
A.之后是APU更换和APU排气管。
B.之后是APU检修门和APU排气管。
C.之后是APU检修门和APU进气管。
D.之前是APU检修门和APU排气管。
正确答案：之后是APU检修门和APU排气管。