第13题: [单项选择]Why are marine organisms good candidates for fossilization A. they have more fleshy structures than land organisms B. It is likely that they will be buried rapidly C. The water environment speeds the decay caused by bacteria D. it takes longer for them to be preserved 参考答案:B
第19题: [单项选择]呼吸道合胞病毒肺炎临床表现是() A. 弛张热,中毒症状重,皮肤有猩红热样皮疹,发病早期两肺有细湿啰音 B. 高热稽留,神萎气促,发病早期肺部体征不明显 C. 小婴儿出现低热,喘憋,面色苍白,肺部有明显哮鸣音 D. 学龄儿童出现发热,咳嗽,无呼吸困难,肺部体征不明显 E. 低热,轻咳,肺部体征不明显,嗜酸细胞明显增高 参考答案:C