4.( )While the alien was visiting the museum, the boy ______the TV station.
A. call B. ask C. called D. asked
3.( )----In our English study reading is more important than speaking, I think.
----- I don’t agree. Speaking is _____ reading.
A. as important as B. so important as C. the most important D. the same as
2.( )You can’t _____ jeans to the party. If you do so, the teacher won’t let you ___.
A. put on ; in B. dress ; out C. have on D. wear; in
1.( )---Can you sing?----Yes I can,_____ I can’t sing very well.
A. but B. or C. so D. and
3. 解:(1)作图略;
(2)取点F和画AF正确(如图);
添加的条件可以是:F是CE的中点;
AF⊥CE;∠CAF=∠EAF等。(选一个即可)
2. 证明:∵AB∥DE,∴∠B=∠DEF,∵AC∥DF,∴∠F=∠ACB,……1分
∵BE=CF,∴BE+EC=CF+EC,即BC=EF,……2分
∴△ABC≌△DEF,∴AB=DE.……3分
1.
解:(1)∵DE∥BC,
∴∠EDB=∠DBC=
···························································· 3分
(2)∵AB=BC, BD是∠ABC的平分线,∴D为AC的中点
∵DE∥BC,∴E为AB的中点,
∴DE=
1. 120° ;2.
;3. 90;4. 25°;5.
;6. 60;7.
;8. 560;9. 48°;10.
;11.
;12. 35;13. 70;14.
或
或
;15. 600.16.7.5;17. 60;18. 50°;19. 45 o;21.
;22. 90 O .23. 70°;24. 25;25。∠ABD=∠BDE或∠ABE=∠DEC或∠ABE+∠DEC=180°;26. 65;27.40;28. ![]()
1.C 2.D 3.C 4.C 5.D 6.C 7.C 8.B 9.C 10.C 11.C 12.C 13.A 14.A 15.B
3.(2008年浙江省衢州)如图,AB∥CD
(1)用直尺和圆规作
的平分线CP,CP交AB于点E(保留作图痕迹,不写作法)
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