The bank is reported in the local newspaper ______ in broad daylight yesterday. A. being robbed B. haring been robbed C. to have been robbed D. robbed
手机最初上市时价格昂贵，使用手机是一种身份的象征，现在却变成了大众消费品，造成这种变化的根本原因是 A．供求关系变化
为了强调物理学对当今社会的重要作用并纪念爱因斯坦,2004年联合国第58次大会把2005年定为国际物理年,某人学习了爱因斯坦发表的理论知识后,有如下理
--Jack's never worked hard at English, _______?-- _______ , so he can't answer the question in English, I think.A．is he; Yes, he isB．is he; No, he isn'tC．has he; Yes, he hasD．has he; No, he ha
设是定义在R上的奇函数，且满足；当时，;令,则函数在区间上所有零点之和为
设，，，是平面直角坐标系中两两不同的四点，若 (λ∈R)，(μ∈R)，且,则称，调和分割， ,已知点C(c，o),D(d，O) (c，d∈R)调和分割点A(0，0)，B(1，0)，则下
Do you love running? It is a good exercise, yet many people find it boring. But what if making your morning jog a creative one? Like jumping from walls and over gaps, and ground roll
从右图《变动着的市场价格》可以得出的合理结论有 ①如果高档耐用品在N点，其替代产品需求量增加② 如果生活必需品在M点，其互补产品需
