【单选题】
三月检液面应在上、下油标___,否则补加润滑油。(摘自三月检规程)
A. 之间
B. 上面
C. 下面
D. 最高
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答案
A
解析
暂无解析
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三月检供风软管外观及紧固状态检查要求在主风缸压力为___及以上时,检查空压机风管软管外层无脆裂,无鼓包、断层等变形现象,否则更换。(摘自三月检规程)
A. 600kPa
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D. 620kPa
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LED动态地图、LCD显示屏外观状态检查要求外观无裂纹,信息显示和状态正常(无缺色、花屏、黑屏),刮伤长度不超过___。(摘自三月检规程)
A. 35mm
B. 36mm
C. 37mm
D. 38mm
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载客量上升时,高度阀动作,使得 ___(摘自车辆检修工教材)
A. 压缩空气由二系弹簧排大气
B. 压缩空气由空气弹簧供风缸向二系弹簧充气
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BCU气路的主要功能是___。(摘自车辆检修工教材)
A. 控制停放制动的施加
B. 控制停放制动的缓解
C. 形成并调整预控压力,实现对单元制动缸的充风
D. 形成并调整预控压力,实现对停放制动缸的充风
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下面关于广播的说法错误的是___(摘自维修手册)
A. 当列车发生意外特殊情况,系统无法判断广播主控单元可能发生故障时,此时激活人工广播可无视优先级限制。
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【单选题】
下面关于广播优先级(由高到低)的说法正确的是___(摘自维修手册)
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【单选题】
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【单选题】
Read this pasaage and answer the five questions
That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the “first-night” effect. If a person stays in the same room the following night they tend to sleep more soundly. Yuka Sasaki and her colleagues at Brown University set out to investigate the origins of this effect.
Dr. Sasaki knew the first-night effect probably has something to do with how humans evolved. The puzzle was what benefit would be gained from it when performance might be affected the following day. She also knew from previous work conducted on birds and dolphins that these animals put half of their brains to sleep at a time so that they can rest while remaining alert enough to avoid predators (捕食者). This led her to wonder if people might be doing the same thing. To take a closer look, her team studied 35 healthy people as they slept in the unfamiliar environment of the university’s Department of Psychological Sciences. The participants each slept in the department for two nights and were carefully monitored with techniques that looked at the activity of their brains. Dr. Sasaki found, as expected, the participants slept less well on their first night than they did on their second, taking more than twice as long to fall asleep and sleeping less overall. During deep sleep, the participants’ brains behaved in a similar manner seen in birds and dolphins. On the first night only, the left hemispheres (半球) of their brains did not sleep nearly as deeply as their right hemispheres did.
Curious if the left hemispheres were indeed remaining awake to process information detected in the surrounding environment, Dr. Sasaki re-ran the experiment while presenting the sleeping participants with a mix of regularly timed beeps (蜂鸣声) of the same tone and irregular beeps of a different tone during the night. She worked out that, if the left hemisphere was staying alert to keep guard in a strange environment, then it would react to the irregular beeps by stirring people from sleep and would ignore the regularly timed ones. This is precisely what she found.
Question1:
What did researchers find puzzling about the first-night effect?
A. What role it has played in evolution.
B. To what extent it can trouble people.
C. What circumstances may trigger it.
D. In what way it can be beneficial. .
【单选题】
Question2:
What do we learn about Dr. Yuka Sasaki doing her research?
A. She found birds and dolphins remain alert while asleep.
B. She found birds and dolphins sleep in much the same way.
C. She got some idea from previous studies on birds and dolphins.
D. She conducted studies on birds’ and dolphins’ sleeping patterns.
【单选题】
在产品只计算材料成本,主要适合于___的产品。
A. 月末在产品数量较大,但各月大体相同
B. 定额资料比较完整
C. 直接材料费用在产品成本中所占比重较大
D. 工资和其他费用发生比较均衡
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将上一步骤转入的半成品成本全部计入下一步骤成本计算单中的“自制半成品或“原材料”成本项目,这种成本结转方式称为___。
A. 分项结转
B. 平行结转
C. 成本还原
D. 综合结转
【单选题】
甲产品由两道工序组成,采用在产品按定额成本计价法分配计算完工产品和月末在产品费用。各工序的工时定额为:第一工序32小时,第二工序12小时。第二工序在产品的累计工时定额为___。
A. 16小时
B. 38小时
C. 44小时
D. 22小时