如图所示，一闭合直角三角形线框以速度v匀速穿过匀强磁场区域．从BC边进入磁场区开始计时，到A点离开磁场区止的过程中，线框内感应电流的情况（
I was busy yesterday, otherwise I ___ your birthday party. A. attended B. had attended C. would attend D. would have attended
我国现阶段坚持和完善按劳分配为主体、多种分配方式并存的分配制度的根本原因是（ ） A．我国现阶段生产力总体水平低、发展不平衡和多层次的状
任务型阅读: The people below are looking for someplace to enjoy some entertainments in Beijing. After the description of these people, there is information about places A — F. Decide which plac
材料是人类赖以生存发展的重要物质．下列材料分类中正确的是（ ） A．铝合金属于金属材料B．有机玻璃属于无机非金属材料C．塑料属于复合材料D．
（07年重庆卷）在下面横线处各补上一句话。要求：每句话不少于7个字，两句字数相等，结构大体一致，整个句子意思连贯。(4分) 快乐似花，
(2013·河南三市模拟)1982年,我国全年社会生产总值为9 894亿元,比上年增长9%；1983年,我国全年社会生产总值为11 052亿元,比上年增长10%。其主要原因是( )
Jane’s husband died last year, leaving her three small boys. This created problems she had never faced before: severe __41__. She didn’t work and therefore she had no income. Christmas wa
