我
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- A．1
- B．-1
- C．-2
- D．2
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- A．-x<SUP>2</SUP>-6x-5
- B．-x<SUP>2</SUP>G3+6x-5
- C．x<SUP>2</SUP>+4x-5
- D．x<SUP>2</SUP>-4x-5
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，则使x+y+z=74成立的y值是( )．- A．24
- B．36
- C．<IMG src="//img1.yqda.net/question-name/ba/198af3f55188f2870e1ae6b2adcbf1.jpg">
- D．<IMG src="//img1.yqda.net/question-name/a8/b57833c30bd073d2b532e26e923f12.jpg">
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