--How does your mother like your presents for Mother’s Day? --Well, _______ this sweater _______ that one is fit for her. They are too big. A. both, and
如图，电源电压U = 220V，且保持不变， L1、L2、L3、L4都标有“PZ110V，40W”字样，开关断开时，四盏灯都能正常发光，若将开
浑水中加入 ，搅拌静止一段时间，泥沙就沉淀下来，然后用 方法，可以除去泥沙。
2010年11月15日，上海市高层住宅发生特大火灾，58人葬身火海，灾难震惊全国．为此专家呼吁：每个人都应懂得防火知识，学会如何逃生．当高层楼房下
近来全球地震多发，依据资料回答下题。 根据图1判断，智利地震引发海啸波及的主要海洋是 A．太平洋 B．印度洋
I fell off the bike on my way to school. _______,I wasn’t hurt. A.Luckily B.Suddenly C.Politely D.Recently
Tom is ten years old this year.He is in Grade Two(二年级)．He doesn't work hard at school.His teacher doesn't like him.But Tom thinks he is the cleverest student(最聪明的学生)in his class
同素异形体相互转化的反应热相当小而且转化速度较慢，有时还很不完全，测定反应热很困难。现在可根据盖斯提出的观点“不管化学过程是一步完成
