【单选题】
举高消防车回转机构液压系统设置了___,可实现启动和制动时平稳可靠。
A. 溢流阀
B. 缓冲阀
C. 节流阀
D. 双向液压锁
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答案
B
解析
暂无解析
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每周应对整个操作、安全系统检查___次,确保车辆性能符合厂家要求。
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液压缸属于___元件。
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关于液压油的介绍有误的是___。
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C. 无腐蚀性
D. 粘度大些更有利于液压系统工作
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以下哪个装置不是压力控制阀___。
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变幅油缸的伸缩使托架可绕支架的通轴在___之间任意俯仰。
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B. -2°~+75°
C. -20°~+75°
D. -12°~+65°
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在变幅油缸、平台油缸和伸缩油缸底部均安装了___,在梯架变幅,平台调平和伸缩运动停止时,将自动闭锁油缸回油油路。
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云梯消防车当梯架全伸出后,变幅小于___时不能回转。
A. 70°
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启动机连续启动三次以上 应间歇___分钟。
A. 7
B. 5
C. 8
D. 10
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瞬时风速超过___级时,云梯车可以投入实战使用,但应把两根安全绳挂在梯架顶端平台两侧,绳索另一端由地面人员分两侧牵引,以保持平台的平衡与稳定。
A. 5
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云梯消防车液压系统用的工作油必须经过严格的过滤,滤油器每___要检查、清洗一次。
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下列关于举高消防车液压油更换周期说法错误的是:___
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正常条件下云梯车每隔___,应通过使用对整车各机构进行一次实战演练性全面检查,做到战时有备无患,随时出动。
A. 半年至一年
B. 半年
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举高喷射消防车在任何工作状态下,中臂与水平线的夹角都不得超过___。
A. 70°
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高喷车进入火灾现场,根据消防实战的需要,用两侧出水口接用水枪或泡沫枪,配合扑救地面中小型火灾时,应注意调整水的流量,其工作压力不应超过___。
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登高平台消防车无论在任何情况下,只要工作平台和水平面之间的倾角超过___,当前动作会自动停止,并且发动机熄火。
A. 10°
B. 15°
C. 20°
D. 25°
【单选题】
当使用登高平台消防车紧急降落功能时,对于伸臂的操作应该___。
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以下关于登高平台消防车操作的叙述正确的是___。
A. 可以在转台操作台上操作
B. 可以在工作平台上操作
C. 转台和工作平台上都可以操作
D. 可同时进行上、下车操作
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举高消防车在使用时需注意天气情况,风力超过___级时应停止作业。
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举高消防车使用时,工作地面需坚实,在车辆横向地面的坡度不得大于___。
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举高消防车在通过地下通道时,其通过高度应不小于___米。
A. 3
B. 4
C. 5
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C. 7~15
D. 8~17
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工作平台和臂的任何部位都应远离障碍物和高压线,距高压输送线应大于___米。
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C. 14
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C. 1.5
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当曲臂与水平夹角达到___°时,限制工作平台左右旋转。
A. 55º
B. 65º
C. 75º
D. 85º
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伸缩臂仰角最高可达___°。
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伸缩臂仰角最小为___°。
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液压泵在连续运转时泵的实际工作压力称为___。
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有两个调整压力分别为5MPa和10MPa的溢流阀串联在液压泵的出口,泵的出口压力为___。
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液压系统的压力是由___决定的。
A. 泵
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通常齿轮泵的吸油管应比压油管___些。
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云梯消防车平台内的额定载荷一般为___。
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下面那个因素不一定需要更换钢丝绳___。
A. 发现有断丝、断股情况
B. 钢丝绳脱节
C. 钢丝绳变形或腐蚀
D. 钢丝绳润滑不够
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云梯消防车发动机保养间隔时间,可按 1小时约对应___的行驶里程掌握。
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8)The breakdown of large molecules to smaller ones is called___
A. respiration
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D. absorption
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9) Which of the following descriptions about the characteristics of nervous regulation is wrong?___
A. It responds fast
B. It acts exactly
C. It responds slowly.D.
D. uration is short
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(1)Which of the following parts of knowledge of drugs should be included in pharmacology?___
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(2)Which of the following is what a clinician is primarily interested in according to the text?___
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(3)Why was the physician not interested in pharmacognosy?___
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(4)Which of the following is the best way of studying pharmacology for medical students and practitioners?___
A. to have a broad botanical knowledge
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【单选题】
(5)What are the tasks related to medicines almost complete!y delegated to the pharmacists now?___
A. the physical and chemical properties of medicines
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(6) What is a main unique aspect of pharmacodynamics?___
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B. Pharmacodynamics is focused on the characteristics of drugs
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D. Pharmacodynamics correlates the entire field of preclinical medicine
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7) What time of history does pharmacodynamics date back to?___
A. the second half of the seventeenth century
B. the second half of the eighteenth century
C. the second half of the nineteenth century
D. the second half of the twentieth century
【单选题】
8)What does the research on pharmacodynamics focus on?___
A. study of clinical effect of drugs
B. study of the process of drugs in the body
C. study of the effect and the mechanism of drugs on the body
D. study of the correlation of the actions and effects of drugs with their chemical structure
【单选题】
(9)Which of the following is true when drugs are selected?___
A. It has to be based in part on legal reasons.
B. It has to be based in part on ethical reasons.
C. It has to be based in part on the pharmacological evaluation in man
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(10)Why are chemotherapeutic agents useful in therapy?___
A. They stimulate or depress biochemical or physiological function in man in a sufficiently reproducible manner to provide relief of symptoms or, ideally, to alter favorably the course of disease
B. They can produce desired effects with only tolerable undesired effects
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1)H. Mario Geysen initially used parallel synthesis as a quick way to identify which small_____ of any given large protein bound to an antibody.___
A. division
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【单选题】
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A. solid
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A. sending
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C. delivering
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A. determine
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A. count in
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C. depend on
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(8)Once they identify a promising substance, they___ make many one-at-a-time modifications to the structure.___
A. laboriously
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(9)Often these procedures yield a compound having acceptable___ and safety.___
A. strength
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10)In many laboratories today, robots___ the routine work of parallel synthesis.___
A. help
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C. assist in
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(2)Formulation is about the design, development and evaluation of dosage forms,___
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(3)Biopharmaceutics mainly studies the in vivo process of drugs and metabolites in humans, animals and tissue culture, which specifically involves___
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D. absorption and excretion
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(4)Regarding the definition of bioavailability(BA), BA is related to___
A. total plasma drug concentration only
B. unbound drug concentration in the plasma
C. unbound drug concentration at the target site
D. total plasma drug concentration, and the administered drug dose
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(5)Plasma drug concentration is affected by following factors such as___
A. rate of absorption
B. rate and extent of distribution
C. rate ofeli Imination
D. all ofabove
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A. i.v.injection
B. i.v.infusion
C. Subcutaneous injection, transdermal and oral
D. None of above
【单选题】
(7)Which of the following factors may influence the time course of a drug in the plasma and hence at its site of action?___
A. Food
B. Disease state
C. Route of administration
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【单选题】
(8)Please identify the potential biological barriers for an orally administered tablet to be absorbed into the systemic circulation___
A. Sk d dermis
B. Gastrointestinal epithelium
C. Oral mucosal membrane
D. All of above