原始生命起源于（ ）
A．原始大气
B．有机小分子物质
C．有机大分子物质
D．非生命物质
原始地球的温度很高，地面环境与现在完全不同：天空中赤日炎炎、高温、紫外线、电闪雷鸣，地面上火山喷发、熔岩横流；从火山中喷出的气体，如水蒸气、氨、甲烷等构成了原始的大气层，与现在的大气成分明显不同的是原始大气中没有游离的氧；原始大气在高温、紫外线以及雷电等自然条件的长期作用下，形成了许多简单的小分子有机物，随着地球温度的逐渐降低，原始大气中的水蒸气凝结成雨降落到地面上，这些有机物随着雨水进入湖泊和河流，最终汇集到原始的海洋中．原始的海洋就像一盆稀薄的热汤，其中所含的有机物，不断的相互作用，经过及其漫长的岁月，逐渐形成了原始生命，因此原始海洋是原始生命的摇篮．现在地球上不可能再形成原始生命了，因为已经不具备当时的环境条件了，如赤日炎炎、高温、紫外线、电闪雷鸣等条件．可见原始生命起源于非生命物质
故选：D
One day a poor man was traveling on horseback. At noon, he tied his horse to a tree and then to eat something. A few minutes later, a rich man came along and tied his horse to the same tree. “Please tie your horse to another tree,” said the poor man. “My horse is wild. It will kill yours.” the rich man said, “I shall tie my horse as I like!” he tied up his horse and had his lunch nearby. After a moment they heard a terrible , the two horses were fighting. They went up to them, but it was too . The rich man’s horse was killed. “See what your horse has done!” cried the rich man. “You will have to it.” And he brought the poor man before Mr. Know. Mr. Know asked the poor man some questions. But he made no. At last Mr. Know said, “This man is dumb. He cannot speak.” “Oh,” the rich man shouted. “He can! He spoke to me when I met him.” “Are you sure?” asked Mr. Know. “What did he?” “He told me not to tie my horse to the same tree because his horse was wild and would kill my horse.” “Oh,” said Mr. Know. “So he you. Then can you expect to get money him?” The rich man said nothing and left silently.
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