关于化学反应中的说法错误的是 A．上图所示的反应为放热反应 B．化学反应中有物质变化也有能量变化 C．需要加热的化学反应不一定是吸热反应 D
如图，在平行四边形ABCD中，对角线AC,BD交于点O,经过点O的直线交AB于E，交CD于F. 求证：OE=OF.
Jo worked at a bush school 76.______ classrooms were made of bamboo and roofs of grass . There is no electricity or water there . Many of the students walked a long way to get to school . Jo hoped
Rest is critical to life and work and a positive attitude towards rest needs to be maintained. Enough rest is significant to our body and mind 36 a lack of adequate rest, as well as __37__ a
In the eyes of Premier Wen Jiabao, there is never ____________thing as far as peasants are concerned. A. too small a B. a too small C. such small a D. a s
2008年6月18日，中国邮政发行了《海峡两岸建设》特种邮票和邮资封。在《海峡两岸建设》特种邮票中有两枚以“闽台缘博物馆”和“湄州妈祖”为题材
（2010·山东圣泽中英文学校高三上第一次阶段测试） 34. To be frank, I really don’t know what they have in ________, because they’re so different in character. A. common
