下列不属于生物固氮条件的是( ) A.氨 B.能量 C.氮气 D. e
Tom arrived at the bus station quite early for the London bus. The bus for London would not leave until five to twelve. He saw a lot of people waiting in the station. Some were standing in lines, an
(2011•黑河)已知二次函数y=ax2+bx+c(a≠0)的图象如图所示,现有下列结论:①b2﹣4ac>0 ②a>0 ③b>0 ④c>0 ⑤9a+3b+c<0,则其中结论正确的个
从世界气候类型分布图上看主要分布于北半球大陆东岸的气候有:( ) A、温带季风气候 B、温带海洋性气候 C、地
鉴别H2、CO及CH4常采用的方法是( ) A.根据燃烧产物的不同 B.根据燃烧时火焰的不同 C.根据是否能发生爆炸
假如你是中学生李华,你的美国朋友Jack在上次给你的电子邮件中抱怨自己最近眼睛近视了。请你给他用英语回一封电子邮件,内容如下: 1、介绍一下
《史记•孔子世家》:周游列国推销自己思想并“知其不可为而为之”的孔子受到了许多同时代人的嘲笑和讽刺,诸如“四体不勤,五谷不分……自腰
I knew he didn’t want to, but my smile leaped through the bars and _______ a smile on his lips, too. A. generated B. stimulated C. emerged