Title: A.(1)???????.
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1.??? A.(1)???????. (2)??????????.
(3)????????,??????.
(4)??OA???AO??????. (5)??A???BC???,??BAAC.
(6)?ABBC,???B?AC???.
(7)??????????????.
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2.?????? A.(1) ??????? ???,? ??????
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(4) A.P.Q.B??????,?? ???, ???,
???. AQAP AB APAQ AB
PQ . ???P???AQ???,?AP2.5
cm, ?PQ cm, AQ cm. ??PQQB2.5cm,?Q?
PB? PB cm.
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B.(1)????AB5cm,BC4cm, ?A?C??????( )
A.1cm C.1cm?9cm B.9cm
D.??????? (4)??????A?B?C,??AB8, AC5,BC3,?(
) A.?C???AB? B.?C???AB????? C.?C???AB?
D.?C?????AB?,??????AB?
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1.??????A?B?C??,AB8cm,BC2cm,??O???AC???,?OB???.
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1.????????A?B?C??,AB8cm,BC2cm,??O???AC???,?OB??
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1.????????A?B?C??,AB8cm,BC2cm,??O???AC???,?OB??
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(2)????AB8cm,???AB????BC,????3cm,???AC
cm. (3)????????A?B?C??AB8??, BC10??,??O???AC???
, ?OB cm.
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(6)B?C???AD?????,M?AB???,N?CD???,?MNa,BCb.???AD?
??( ) A.2(a-b) B.2a-b C.ab
D.a-b
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4.?????? ???? 5.??????? 1.5
600 2.5 6.?????
15- ??,AP?CP,BP?DP,?138,?APD_____?
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142
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- 1.?ABC???,??B??????BD??ABC???DBA??DBC,??BD??ABC???
??, - ?DBA?DBC
- ??BE?BF????DBA??DBC?????,???EBD?DBF
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2.(??)
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??,???????,????A??A?,BC???,??ABD ?DBE,??CBD????
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1.???????????. ( ) 2.?ABBC,???B?AC???.
( ) 3.??????????????. ( ) 4.????,???80cm,??13
0cm, ???????,????????, ?????????????????
5.????????A?B?C??,AB10cm, BC6cm,??O???AC???,?OB
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20C?D????????AB??,?????????,????? A?B????????AB??,??
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