下列做法中不可取的是 A．工业废水处理达标后循环使用 B．农业浇灌推广使用喷灌、滴灌技术 C．大量开采使用地下水 D．洗菜、淘米、洗衣
Kate won her first gold medal at the age of 7 . A．when it was 7B．when she was 7C．at 7D．when I was 7
You can________the word in the dictionary if you don't know it. A．give away B．look up C．take after D．cut off
为迎接2008年奥运会的召开，某中学准备开展以“弘扬人文精神,构建和谐校园”为主题的社会科学普及周活动。在中国古代传统文化中，最有利于建立“
水的状态除了气、液和固态外，还有玻璃态．它是由液态水急速冷却到165K时形成的，玻璃态的水无固定形状，不存在晶体结构，且密度与普通液态水的
A characteristic of American culture that has become almost a tradition is to respect the self-made man — the man who has risen to the top through his own efforts, usually beginning by working with
——Can you go camping with me tomorrow? ——_________. A．No, I don’t． B．Sure. C．No, I can’t． D．Let’s
如图所示，质量M=4 kg的滑板B静止放在光滑水平面上，滑板右端固定一根轻质弹簧，弹簧的自由端C到滑板左端的距离，这段滑板与木块A之间的动摩擦因
