原始生命形成的场所是在
A．原始海洋中
B．原始大气中
C．火山口
D．原始陆地上
答案：A
题目分析： 原始大气的主在成分有氨、氢气、甲烷和水蒸气，但是没有游离的氧气，同时，强烈的紫外线、闪电、热能和宇宙的激发下，原始大气中的各种成分分子相互作用而形成有机小分子，这些有机小分子随着雨水汇入热汤似的海洋。在原始的海洋中，有机小分子经过长期演变，最终形成最简单的原始命形式，所以原始的生命起源于非生命物质，诞生于原始的海洋，故选项A符合题意。
Teens ---want to gain valuable work experience? Do you enjoy working with kids? Need to finish community service requirement for school? Volunteer for the alameda recreation and park department! Volunteers are needed to help Recreation Leaders with youth programs and special events at our local park. During the summer, volunteers are also needed to help with our Aquatics Program at the swim center as well. This is a perfect opportunity to gain valuable work experience for future employment opportunities. Don’t delay(延迟)! Spaces Are Extremely Limited! Sign up early! l You may register in person or mail the completed form and payment to: Alameda Recreation and Park Department, 2226 Santa Clara Avenue, Alameda, 94501. l Faxed registrations accepted with MasterCard/ VISA,(510)747—7566. Once your application has been reviewed(审查), you will be contacted by the Teen Coordination to plan an oral interview. If you are accepted into the program, you must attend a volunteer training. All applications are to arrive no later than two weeks before the training date (listed below) and are limited to space availability. Not all applications will be surely given an interview. Late Applications will not be dealt with.
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