【单选题】
高压电气试验中下列说法错误的是:___
A. 在同一电气连接部分进行高压试验前,必须暂停其他检修工作,试验结束、设备未充分放电前不得许可其他工作
B. 被试设备两端不在同一地点的,试验时两端必须有人监护并采取防范措施
C. 试验设备应在检验合格有效期内,采用专用的试验仪器和设备
D. 试验中断、变更接线或试验结束时应观察15分钟后断开试验电源,将被试设备放电并短路接地
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答案
D
解析
暂无解析
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中控系统维护检修时,下列说法错误的是:___
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站控系统检修维护中,下列说法正确的是___。
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(9) Given the same administration dose, which of the following will likely result in varying bioavailabilities for the same drug administered to the same person? ___
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(10)Which of the following statements is true?___
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The nervous system uses electrical signals to transmit information very rapidly to specific cells.
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A. 对
B. 错
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2)It's unreasonable for a physician to be interested mainly in the effects of drugs on human beings, for the pharmacological evaluation of drugs in them may be limited due to technical, legal, and ethical reasons.
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B. 错
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(3) As the effects of drugs are often characterized by significant interspecies variation and may be further modified by disease, clinical pharmacology has never been efibrasized.
A. 对
B. 错
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The physician is not interested in drugs that are useful in the prevention,diagnosis,and treatment of human disease, but in chemical agents that are commonly responsible for household and industrial poisoning as well as environmental pollution.
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B. 错
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(5)A drug is said to be useful in therapy if it has the ability to produce its desired effects with only tolerable undesired effects.
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B. 错
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(6)Toxicology deals not only with drugs used in therapy but also with many other chemicals that may be responsible for household, environmental, or industrial intoxication.
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1)With the more efficient screening tests and burgeoning knowledge about how a molecules biological activities are likely to be changed, the traditional approach of discovering new drugs has been improved.
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4) In many laboratories, robots are used in the routine work of parallel synthesis to deliver small amounts of reactive molecules into appropriate wells, thus making the process more accurate and less tedious.
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5) In a parallel synthesis, each compound remains in its own container; while in a split-and-min synthesis, the related ce mpounds are mixed up in the same reaction vessel.
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B. 错
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A. 对
B. 错
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A. 对
B. 错
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(6)Prodrugs are not therapeutically effective unless they are changed into therapeutically active forms before or after reaching the systemic circulation
A. 对
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(3)生物圈的范围为___
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