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- 1( )The food bank often ____ food ____ homeless people.
- 2拖拉机深耕时总比在道路上行驶时速度慢,这是为了( ) A.提高传动机械的效率 B.节省燃料 C.增大拖拉机的牵引力 D.提高柴油机的功率
- 3表示电池电动势的符号E是希腊字母吗?
- 4若二次函数f(x)=ax²-bx+c 满足f(x1)=f(x2).则f(x1+x2)等于多少?
- 5they have some bottles of milk in chair desks.对some bottles of milk 提问
- 6(A1+A2+.An-1)(A2+A3+.+An-1+An)-(A2+A3+..An-1)(A1+A2+...An)
- 7矩阵相乘等于他们的行列式相乘
- 8英语翻译
- 9we went (camp) in the mountains last summer vacation
- 10甲数的三分之一等于乙数的五分之二,甲:乙