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- 1已知x1、x2为方程x2+3x+1=0的两实根，则x12+8x2+20=_．
- 2Alice often _____[have]some milk and bread for breakfast.
- 3马来西亚 印度 意大利 中国 巴西 墨西哥 肯尼亚 加拿大 哪些是发展中国家?哪些是发达国家?
- 4在三角形abc中 已知a=2,c=（根号3）+1,a=45度,求其它的边和角.
- 5Who is going to study abroad next year?'(the next year)
- 6中等号左边添上运算符号和括号,使结果等于右边的数,3,3,3,3,=7
- 7请老师同学们回答?
- 8What do people often say when they meet at Christmas
- 9Where does a person stay for the longest time in his life?why?
- 10黄铜矿精炼反应比较复杂工艺的