We've been looking for cheap houses but haven't found we like yet. A.one B.other C.it D.that
We have every reason to believe that __________ 2008 Beijing Olympic Games will be __________ success. A. 不填; a B. the; 不填 C. the; a D. a; a
已知:如图,是⊙的直径上任意一点,过点作的垂线,是的延长线上一点,联结交⊙于点,且.1.判断直线与⊙的位置关系,并证明你的结论;2.若,,
物理活动课上,王老师做了一个有趣的实验:将一个黄色的乒乓球和一个玻璃球全部埋入装有米的大烧杯中,摇晃烧杯一段时间,乒乓球从米中“跑”
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已知函数是定义在上的奇函数. (Ⅰ)求的值; (Ⅱ)函数的值域; (Ⅲ)当时,恒成立,求实数的取值范围.
边长为5cm的菱形,一条对角线长是6cm,则菱形的面积是 cm2.
有关物种的叙述正确的是()①一个种群就是一个物种;②具有一定的形态结构和生理功能,能相互交配且产生可育后代的一群生物;③隔离是新物种