While I was waiting outside my wife’s office building for her to get out of work, I saw a beggar coming my way from across the parking lot. “I hope he doesn’t ask me for any money,” I thoug
四棱锥P－ABCD中，AB、AD、AP两两垂直，AB＝1，AD＝2，AP＝3，F为PC的中点，E为PD上，且PD＝3PE，用 (1) (2)求的模．
某学者说：“宋代词曲盛行，从汴京到临安，花阵酒池，四处闻丝竹之声；燕馆歌楼，八方新声巧笑。每到夜晚，市民们往往结伴出游，到瓦舍勾栏
When I arrived at the company, the manager ______, so we had only time for a few words. A. just went away B. had gone away C. was just going away D. has just gone away
下列句中加点成语运用不正确的一项是 ( ) A.有评论家认为,拿名人博客文章“开刀”,对其吹毛求疵,显然是必要的。 B.某校举行了迎国庆联欢会,校长亲
On May 23, six pandas left an important panda base (基地) in Wolong, southwest China’s Sichuan Province(四川省), because of damaged (损坏的) shelters and food shortages（短缺）after the
下列溶液中溶质的物质的量浓度为1 mol·L-1的是 ( )A.将40 g NaOH溶于1 L水所得的溶液 B.将22.4 L HCl溶于水配成1 L溶液 C.1 L含2 mol K+的K2SO4溶液 D.将0.5 mol
同学用一电源（不知电压）、两个开关、一个电流表、一个滑动变阻器R（20Ω，2A）和若干导线来测一个小灯泡的额定功率，小灯泡上仅有“0.2A”字样，
