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Is it difficult to have three consultations in Chengdu in 2009?
Moderate difficulty! I have some answers, and some reference answers.

Chinese dbcacddcd

Mathematics ADBAD CABCB BC (2) (A > B)( 12) (13 is correct)

English

It happened ~ it happened

Get a plus sign there

Of course, of course, of course, ruled out the possibility.

Physical D C A B AD C BC AD Xiao Zhang (3.549-3.511) U/I-R decreased.

Chemical BDB

Biological CBADD