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- 1方程x2+(m-2)x+5-m=0的两根都大于2,则m的取值范围是( ) A.(-5,-4] B.(-∞,-4] C.(-∞,-2] D.(-∞,-5)∪(-5,-4]
- 2建筑队把水泥、黄砂、石子按2:3:5的比例配制成一种混凝土,已知水泥比石子少7.2吨,那么,配制这种混凝土一共需要用材料多少吨?
- 3哪个成语的第一字含有"然"
- 4改错They are try to find a way to solve the problem._______ 要写出正确单词
- 5Steel Tube(钢管) :16φ*0.8MM,
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- 7秋天到了,天气凉了.我想到哪些词语和诗句?
- 8English is a useful language 谁帮我以此题写个100字的文章啊
- 9when is the meeting supposed to start?It is __.A.about to begin B.to begin 为什么选a
- 10Sandy isn't going to visit the museum next week.(同义句) Sandy___ ___to visit the museum next week