It’s two and a half weeks since the exchange students __________ Taixing.A．arrivedB．reached C．have been inD．have arrived in
一个具有Aa和Bb两对同源染色体的卵原细胞，当形成的卵细胞中存在Ab染色体时，三个极体中的染色体应是 A．Ab、aB、aB B．AB、ab、aB C．ab、AB、AB D
下面是一个通知的原文，它非常啰嗦，试加以修改，不超过30字。 明天下午两点在会议室召开高中语文教师会，座谈高中语文教学新大纲，希望高中语
Many great artists were not famous in their own time, and people only started to _____ them many years later． A．remind B．appreciate
2010年3月11日，《西藏日报》发表评论员文章《国家利益不容侵犯》。文中指出：国家利益不容侵犯，主权和领土问题不可能有任何商谈的空间，不可能
下列物质属于纯净物的是（ ） A．冰水混合物 B．矿泉水 C．葡萄酒 D．洁净的空气
将参数方程化为普通方程为（ ）A． B． C． D．
Eventually, the President had to leave office_____ public pressure in order to ease the tension of the situation. A．in favor of B．in response to C．in return
