灞变笢鐪佷笢钀ュ競
2019
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锛堟湰澶ч鍏?/p>
10
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3
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30
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(
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b
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C.
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6
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6
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c
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b
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D
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E
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c
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3
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4
锛庡凡鐭ワ細濡傚浘锛屾槸鐢辫嫢骞蹭釜澶у皬鐩稿悓鐨勫皬姝ｆ柟浣撴墍鎼垚鐨勫嚑浣曚綋鐨勪笁瑙嗗浘锛屽垯鎼垚杩欎釜鍑犱綍浣撶殑灏?/p>
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(
) A. 6
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B. 7
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C. 8
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D. 9
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5
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x
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=1
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m
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A
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m
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C
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m
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2
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m鈮?
D
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6
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C
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,
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A
銆?/p>
12cm B
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20cm C
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24cm D
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28cm
7
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3
涓婏紝涓旂偣
A
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A
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5
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鐨勮窛绂讳负
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B
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0
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1
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C
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2
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D
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3
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8
銆佷粖骞村鏍′妇琛岃冻鐞冭仈璧涳紝鍏辫禌
17
杞紙鍗虫瘡闃熷潎闇�鍙傝禌
17
鍦猴級锛岃鍒嗗姙娉曟槸锛氳儨
1
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1
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1
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16
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6 B
銆?/p>
5 C
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4 D
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3
9
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ABC
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C=90
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AC=BC=
2
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A
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60
掳鍒?/p>
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A
銆?
B
銆?
C
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D
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1