Carbonate rocks are predominantly composed of intra - clastic dolostone, chert dolostone and sand - bearing dolostone.碳酸盐岩以内碎屑白云岩 、 燧石白云儿和含砂白云岩为主.The sediments in this photo curve near the ends of chert pods.这沉淀物在这幅图片的曲线...
Objective To evaluate the environmental estrogenic activity of the pesticide fenitrothion and study the possible mechanism.目的检测杀螟硫磷的环境雌激素活性,并探讨其作用机制....
He had a reputation for being bloody-minded and difficult.他为人刻薄、难相处是出了名的。This age-old struggle for control had led to untold bloody wars.这场由来已久的对控制权的争夺已经引发了无数流血的战争。He was arrested last October still carrying a bloody kni...