1.下列词语中加横线字的读音,全都正确的一组是( ) A.一暴十寒(pù) 执拗(niù) 人才济济(jǐ) 忖度(cǔn duó) B.不落
早期的自养型生物可能是( )A.原始的眼虫类生物 B.绿藻类原始真核生物C.蓝藻类光合原核生物 D.进行光合作用的需氧类植物
委内瑞拉、哥伦比亚、厄瓜多尔、秘鲁和玻利维亚等国的驻华大使,每年6月5日都要到北京的朝阳公园向“拉丁美洲解放者”的铜像进献花篮。该铜像人
挑选适宜播种的种子时,需要测定种子的发芽率,具体做法是( ) A.随机抓取20粒种子,发芽率超过90%
已知函数f(x)=g(x)=f(x)+x+a.若g(x)存在2个零点,则a的取值范围是( ) A.[-1,0) B.[0,+∞) C.[-1,+∞) D. [1,+∞)
As human beings we like to think of ourselves superior(高级) to other creatures, but sometimes we can learn something from them.. One day at lunchtime I _36_my office, took out a sandwich, and _3
_____ it have been the failure to pick up directions from the ground control that caused the air crash? A. Must B. Could C. Would D. Should