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1.B 2.D 3. D 4. C 5. B 6. A 7. A 8. C 9.B 10.A 11.B
12. D
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13. 10,10
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42
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2) 15.2
17. 32 18.60
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19
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(1)
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(2
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)
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-
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7y=14 y=2 (3
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y=2
浠ｅ叆鈶犲緱锛?/p>
x=2 (4
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there4;
鏂圭▼缁勮В涓?/p>
(5
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2
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.
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4
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there4;
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-1,0
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1
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2.
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5
鍒?/p>
20
銆佽В鈶寸敱鈶?/p>
-
鈶∶?
寰楋細
y=1-m
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1
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x=3m+2
there4;
鍘熸柟绋嬬粍鐨勮В涓?/p>
锛?/p>
3
鍒?/p>
鈶碘埖鍘熸柟绋嬬粍鐨勮В涓?/p>
鏄竴瀵规鏁?/p>