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- 1若方程x²-2x+根号3(2-根号3)=0的两个根是a和b(a>b),方程x-4=0的正跟是c.
- 2方程 5x+2=12 3(2x+5)=45
- 3My mother does not at home.
- 4某反应2N2O5(g)→4NO2(g)+O2(g),N2O5的起始浓度为2.1mol/L,经过100s后达到平衡,及格过测定知道此时N2O5的浓度为1.95mol/L.求:
- 5英语翻译
- 6If it is ________tomorrow,we'll have to have the PE lesson in the classroom.(rain)
- 7They were hopeful that...这里that引导什么从句?
- 8甲、乙两车同时从A、B两城出发,相向而行.经过一段时间后,甲车行了全程的2/3,乙车行了全程的45%,这时两车相距35千米.A、B两城相距多少千米?
- 9甲数的二分之五倍是一百乙数是36的九分之五化甲乙两数的和是多少
- 10看不懂呢~camino yo mismo,nadie me acompaña.西班牙语的,