20世纪初，中国社会发生了深刻变化，旧的习俗被打破，新的观念逐渐形成，社会风气也在悄然改变。阅读材料，回答问题。 今有南清志士某君，北
Recently, a case of lifeboat ethics (伦理) occurred. On Aug. 4, Graham and Sheryl Anley, while boating off the coast of South Africa, hit a rock. As the boat threatened to sink, the husband got
下列实验操作中，正确的是 A．给试管内的液体加热时，试管口不能对着人 B．向试管里滴加液体药品时，胶头滴管应伸入试管内 C．用托
句子翻译;根据所给中文完成句子翻译。 1.我相信你的梦想会实现的。I believe your dream will _____ _____ one day 2.我上学从不迟到。I _____ never _____ late for school 3
The fact showed that the voyages of travelers before the 17th century were not ______the sea even though they didn't have modern navigational aids. A. at the expense of B. at
I’m afraid that there is no ______ for you in my car, because there are already five people.A．landB．groundC．roomD．floor
在平面直角坐标系xOy中，已知点A（1，0）和点B（4，3），以、为邻边作平行四边形．若两条对角线的交点为C则，=______．
已知体内某一大分子物质的分子式是C3032H4816OxN780S8Fe8，由此作出下列结论正确的是（ ） A．该物质最可能是蛋白质，组成这个蛋白质分子的氨基
