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20. гصϳɳ
A. ֮ B. ɽˮ C. ֳ D. ֮ 𰸡B
鳤ɳеĵɳһɽˮޡǡһʤأֱ´ɽ潭ˮޡɳǡ
ۺ⣨7С⡣60֣
21. ʫļɳijѧںɭֹչҰͼش⡣
1Сˢ٢ɽ·¶Ƚϻ_______· 2ͼɽĺθ߶ȿǣ
A. 390.5 B490.5 C590.5 D690.5
3¶Ӫһѡڵƽƽ̹ԶʡֺΪABʺ¶Ӫ________________ 𰸡1 2C 3A
ȸߵͼж
1·ȸϡ裬¶Ȼ·ȸܼ¶ȶ
2ͼеȸ߾Ϊ100ףͼɽȸֵΪ500ףɽĺν500600֮䣬ϸ÷ΧֻѡC
3ͼ֪A¶ӪʣΪBɽȵشк 22. Ҫϵۺ˼άҪؼϵӰ졢Լͼش⡣ һͼ
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϶ϲɺɺɽʮڴϿȵض˺ӵˮ̺ϼݳΪ߲ˮأӶ̬˲תӰ졣ʮúˡϰӡ˶
1ͼϢָϱηֲͬص__________________________________ 2ͼмסжн_____________ӡ
3һȴͼABʺֲȵ______________ 4ͼIJϣܴ̬_____________˫ѡ ˮƿ 谭Σ ۼӾػĮ ˮֺ 𰸡1ͬƵɽϵɽأɽ 2 3B 4ڢ
ϱĵ 1ϱɽͬڿƵɽϵ
2ΪȺӣλڱ´нΪӣλȴûн 3Aλ´BλȴBʺֲȴȡ
4Ķ϶ץסؼʡ̬⡱ȷѡӻˮƿˮֺ谭ΣͬʱӾػĮ 23. Űݻͨ˹ͬ壬衰־úƽձ鰲ȫͬ١Űݡ硱кԹǶͨŦսλҪͼش⡣
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1жָϲͷС庣֮ƣСޡָ___________ __________ޡ
2ԴԼڽĻǵжҪءȻԴһһࡱһ١ָˮԴѷǶȼˮԴѷԭ________________________________һࡱָ索___________ԴжĻԪ˹̶̡̡̫ͼе_______________ ()Ϊʥǡ
3ÿ궬ŷοƫȵкذɳ̲Դ_________________________________________________________________________ 𰸡1ޡŷޡ 2ȴɳĮˮ٣ ʯ Ү·
3кºͣճ㣻ŷʪ١ жŷĵ 1ͼ֪ޡָޡŷޡޡ
2жҪΪȴɳĮˮ٣ˮԴѷжʯԴḻʯͱ⡣Ү·䱻̡˹̶̡̫ʥǡ
3ɷֱӱŷ͵кذͼصкڵкºͣճ㣻ŷγȽϸߣ䶬ʪ١
24. ߽֪ӡǴĿǰ˿ڳ13ڣйͶԴḻձø߶ȷǿ˿仯ءͼش⡣
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1ͳͼͶȴ___________
2ӡÿнȫ1/2ķҵΪ칫ҡùϲΪӡȹȡij___________Ͷɱгձ˾ӡ۵Ҫ________________________________________________________________________ 32018514գ69ꡰʿIJ徭5ս³ɹǶλᲴѩΣԴͼ˵µǶѡÿ4-5·ݵҪԭ__________ ______________________________________________________________________________________ 𰸡1 2
ӡͶԴḻˮƽͣ˿ڶ࣬г 3ϼδ,ˮ
ӡȺձĵ
1ͼ֪ȴȴ
2ӡȹȡָձ˾ӡӡӵ۵Ͷ۵ӡйг
345·ϼδ٣ˮ٣ΣС
25. ·ɳijѧͼ·ߣúٿչй֮áѧͼش⡣
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