Willis cycle

题目

Willis cycle

相似考题

1.Feasibility studies occur in which life cycle phase (s)?A.ConceptualB.Conceptual or DevelopmentC.ExecutionD.Preliminary planningE.any life cycle phase

2.● Feasibility studies occur in which life cycle phase (s)?A ConceptualB Conceptual or DevelopmentC ExecutionD Preliminary planningE any life cycle phase

3.If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two stroke/cycle diesel engine will develop approximatelyA.the same indicated horsepower as a four-stroke/cycle engineB.twice the indicated horsepower as a four-stroke/cycle engineC.one half the indicated horsepower as a four-stroke/cycle engineD.one power stroke for every two crankshaft revolutions

4.141 Feasibility studies occur in which life cycle phase (s)?A. ConceptualB. Conceptual or DevelopmentC. ExecutionD. Preliminary planningE. any life cycle phase

参考答案和解析
正确答案: 脑底动脉环，也称Willis环，由前交通动脉、两侧大脑前动脉的起始部，两侧颈内动脉的末端、两侧后交通动脉和两侧大脑后动脉的起始段共同围成。位于颅底下方，蝶鞍上方，视交叉、灰结节及乳头体的周围。
更多“Willis cycle”相关问题

  • 第1题：

    The life cycle of a project is a description of the various phases of the project from the beginning to the end. One of the followings is not a phase of the traditional project life cycle, It is（ ）.

    A.development
    B.concept
    C.system analysis
    D.implementation

    答案：B
    解析：
    翻译：项目的生命周期是对项目各个阶段从开始到结束的描述。下列哪项不是一个阶段的传统项目的生命周期，它是概念阶段。A．开发 B．概念 C．系统分析 D．实施

  • 第2题：

    CYCLE81，CYCLE82，CYCLE83指令均为钻孔循环指令（SIEMENS系统）。


    正确答案:正确

  • 第3题：

    One hertz is equal to one ( )

    • A、cycle per centimeter
    • B、cycle per meter
    • C、cycle per second
    • D、cycle per eV

    正确答案:C

  • 第4题：

    下列指令中，（）是毛坯切削循环指令（SIE州田NS系统）。

    • A、CYCLE93
    • B、CYCLE95
    • C、CYCLE96
    • D、CYCLE97

    正确答案:B

  • 第5题：

    关于CYCLE81指令，下面说法正确的是（）（SIEMENS系统）。

    • A、CYCLE81是深孔钻循环指令
    • B、使用CYCLE81指令可以简化编程
    • C、CYCLE81指令执行间歇切削进给到孔的底部
    • D、完成CYCLE81指令后刀具将返回到返回平面
    • E、用CYCLE81指令钻孔切削到孔底后，刀具快速返回

    正确答案:B,D,E

  • 第6题：

    钻镗循环的深孔加工时需采用间歇进给的方法，每次提刀退回安全平面的应是（）。（SIEMENS系统）

    • A、CYCLE81
    • B、CYCLE82
    • C、CYCLE83
    • D、CYCLE84

    正确答案:C

  • 第7题：

    Willis cycle


    正确答案: 脑底动脉环，也称Willis环，由前交通动脉、两侧大脑前动脉的起始部，两侧颈内动脉的末端、两侧后交通动脉和两侧大脑后动脉的起始段共同围成。位于颅底下方，蝶鞍上方，视交叉、灰结节及乳头体的周围。

  • 第8题：

    英译中：Cycle stock


    正确答案: 经常库存

  • 第9题：

    下面指令中，（）是切槽循环指令（SIEMENS系统）。

    • A、CYCLE93
    • B、CYCLE95
    • C、CYCLE96
    • D、CYCLE97

    正确答案:A

  • 第10题：

    单选题
    The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）
    A

    one half crankshaft speed in a two-stroke cycle diesel engine

    B

    crankshaft speed in a two-stroke cycle diesel engine

    C

    two times crankshaft speed in a two-stroke cycle diesel engine

    D

    one-fourth times crankshaft speed in a four-stroke cycle diesel engine


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）
    A

    bearing pressure in a four-stroke/cycle acting single diesel engine is continually reversed

    B

    bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversed

    C

    the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine

    D

    two-stoke/cycle diesel engines require more complicated lubrication piping


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）
    A

    In a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greater

    B

    Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the ports

    C

    No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engine

    D

    The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine


    正确答案： A
    解析： 暂无解析

  • 第13题：

    如果需要大翼除冰系统以人工方式工作，则

    • A、按压SINGLE电门
    • B、将CYCLE旋扭置于MAN位
    • C、将CYCLE旋扭置于FAST位
    • D、将CYCLE旋扭置于SLOW位

    正确答案:A

  • 第14题：

    Willis环


    正确答案: 脑底动脉环，也称Willis环，由前交通动脉、两侧大脑前动脉的起始部，两侧颈内动脉的末端、两侧后交通动脉和两侧大脑后动脉的起始段共同围成。位于颅底下方，蝶鞍上方，视交叉、灰结节及乳头体的周围。

  • 第15题：

    CYCLE93和CYCLE95指令都用于切槽和钻孔，只是切削的方向不同（SIEMENS系统）。


    正确答案:错误

  • 第16题：

    关于CYCLE93指令，（）（SIEMENS系统）。

    • A、CYCLE93是切槽循环指令
    • B、使用CYCLE93指令可以简化编程
    • C、CYCLE93指令可实现断屑加工
    • D、CYCLE93指令可用于切削圆锥面和圆弧面
    • E、CYCLE93可用于径向沟槽的切削加工

    正确答案:A,B,C,E

  • 第17题：

    关于CYCLE83指令，下面说法正确的是（）

    • A、CYCLE83是深钻孔循环指令
    • B、使用CYCLE83指令可以简化编程
    • C、CYCLE83指令执行连续切削进给到孔的地步
    • D、完成CYCLE83指令后刀具将返回到参考平面
    • E、用CYCLE83指令钻孔切削到孔底后，刀具快速返回

    正确答案:A,B,D,E

  • 第18题：

    Clock Cycle


    正确答案:时钟周期

  • 第19题：

    大脑动脉环（Willis环）


    正确答案:大脑动脉环位于脑底的下方，蝶鞍上方，由两侧大脑前动脉起始端、两侧颈内动脉末端与两侧大脑后动脉借前、后交通动脉彼此吻合形成，又称Willis环，该环围绕在视交叉、灰结节和乳头体周围，此环使两侧颈内动脉系与椎-基底动脉系相交通。

  • 第20题：

    磷循环 phosphorus cycle


    正确答案: 磷在陆地生命体和土壤等几个分室中的迁移和转化过程。

  • 第21题：

    名词解释题
    Willis cycle

    正确答案： 脑底动脉环，也称Willis环，由前交通动脉、两侧大脑前动脉的起始部，两侧颈内动脉的末端、两侧后交通动脉和两侧大脑后动脉的起始段共同围成。位于颅底下方，蝶鞍上方，视交叉、灰结节及乳头体的周围。
    解析： 暂无解析

  • 第22题：

    单选题
    The size of the exhaust valve opening is （）
    A

    most critical in a four-stroke cycle diesel engine

    B

    most critical in a two-stroke/cycle diesel engine

    C

    most critical in a four-stroke/cycle diesel engine if it is turbocharged

    D

    of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
    A

    two crankshaft revolutions in a two-stroke/cycle engine

    B

    two power strokes in a two-stroke/cycle engine

    C

    one power stroke in a two-stroke/cycle engine

    D

    two piston strokes in a two-stroke/cycle engine


    正确答案： B
    解析： 暂无解析

  • 第24题：

    单选题
    If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two-stroke/cycle diesel engine will develop approximately（）
    A

    the same indicated horsepower as a four-stroke/cycle engine

    B

    twice the indicated horsepower as a four-stroke/cycle engine

    C

    one half indicated horsepower as a four-stroke/cycle engine

    D

    one power stroke for every two crankshaft revolutions


    正确答案： D
    解析： 暂无解析

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