问题
单项选择题 A3/A4型题
女性，70岁，高血压病20年。2个月前开始乏力、食欲缺乏，伴恶心、呕吐。查体血压170/100mmHg，Hb70g/L，血肌酐600μmol/L。
该患者在接受透析治疗前采用的较为安全有效的药物是（）
A.呋塞米
B.钙拮抗药
C.卡托普利
D.安体舒通
E.A-Ⅱ受体阻断药
答案
参考答案：B
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女性，70岁，高血压病20年。2个月前开始乏力、食欲缺乏，伴恶心、呕吐。查体血压170/100mmHg，Hb70g/L，血肌酐600μmol/L。
该患者在接受透析治疗前采用的较为安全有效的药物是（）
A.呋塞米
B.钙拮抗药
C.卡托普利
D.安体舒通
E.A-Ⅱ受体阻断药
参考答案：B
| 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. |
The implication in this passage is that ______.
A．only a German physicist could discover such a theory
B．quantum theory, which led to the development of twentieth century physics, is basically a mathematical formula
C．Planck’s constant was not discernible before 1900
D．radiation was hard to study