对虾的排泄器官随发育而变化，幼体时以（）进行排泄，到成体时则由（）取而代之。 发布时间：2017-07-31 15:19 │ 来源：www.tikuol.com 题型：填空题 问题： 对虾的排泄器官随发育而变化，幼体时以（）进行排泄，到成体时则由（）取而代之。
题型：填空题 男，52岁。右季肋部胀痛伴低热2月余。查体：颈部可见蜘蛛痣，肝肋下6cm，质硬，表面不平，压痛（+），肝区可闻及血管杂音，脾肋下3cm。10年前曾查HBsAg（+），ALT82U/L。诊断首先考虑（）A.慢性活动性肝炎B.肝硬化C.肝脓肿D.原发性肝癌E.慢性胆囊炎 查看答案
题型：填空题 Awarded the Nobel Prize for physics in 1918, German physicist Max Planck is best remembered as the originator of the quantum theory. His work helped usher in a new era in theoretical physics and revolutionized the scientific community’s understanding of atomic and subatomic processes. Planck introduced an idea that led to the quantum theory, which became the foundation of twentieth century physics. In December 1900, Planck worked out an equation that described the distribution of radiation accurately over the range of low to high frequencies. He had developed a theory which depended on a model of matter that seemed very strange at the time. The model required the emission of electromagnetic radiation in small chunks or particles. These particles were later called quantums. The energy associated with each quantum is measured by multiplying the frequency of the radiation, v, by a universal constant, h. Thus, energy, or E, equals hv. The constant, h, is known as Planck’s constant. It is now recognized as one of the fundamental constants of the world. Planck announced his findings in 1900, but it was years before the full consequences of his revolutionary quantum theory were recognized. Throughout his life, Planck made significant contributions to optics, thermodynamics and statistical mechanics, physical chemistry, among other fields.In which of the following fields did Max Planck NOT make a significant conla4bution A．Optics.B．Thermodynamics.C．Statistical mechanics.D．Biology. 查看答案
