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参考答案和解析
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更多“物体的正投影特性是绘制三视图的依据。 We can get three views of solid based on the feature of orthographic methods.”相关问题
  • 第1题:

    The RECYCLEBIN parameter is set to ON for your database. You drop a table, PRODUCTS, from the SCOTT schema.Which two statements are true regarding the outcome of this action?()

    A. All the related indexes and views are automatically dropped

    B. The flashback drop feature can recover only the table structure

    C. Only the related indexes are dropped whereas views are invalidated

    D. The flashback drop feature can recover both the table structure and its data


    参考答案:C, D

  • 第2题:

    三视图是按正投影法绘制的图形。


    正确答案:正确

  • 第3题:

    NBAR is a Cisco IOS feature that can be used to perform three tasks?


    正确答案: (1)Protocol discovery
    (2)Traffic statistics collection
    (3)Traffic classification

  • 第4题:

    用正投影法,将物体分别向三个投影面上所作的投影图称为三视图。


    正确答案:正确

  • 第5题:

    Which two statements are correct regarding the Flashback Versions Query feature?()

    • A、 You can use this feature to identify the committed versions of the rows, but not the uncommitted versions.
    • B、 You can use this feature to identify the versions of V$ views.
    • C、 You can use this feature to identify the inserts, deletes, and updates performed on a particular row but not the data definition language (DDL) operations performed on the table.
    • D、 You can use this feature for a table only if row movement is enabled for the table.
    • E、 You can use this feature to identify the versions of external and fixed tables.

    正确答案:A,C

  • 第6题:

    机械图样中绘制三视图所采用的投影法是()

    • A、中心投影法
    • B、平行投影法
    • C、正投影法
    • D、斜投影法

    正确答案:C

  • 第7题:

    单选题
    which one of the following best describes the use of hidden column formula?()
    A

    views can be hidden based on a formula 

    B

    hidden columns are not a supported feature 

    C

    table columns can be hidden based on a formula  

    D

    view columns can be displayed or hidden based on a formula 


    正确答案: A
    解析: 暂无解析

  • 第8题:

    问答题
    Most people would describe water like a colorless liquid. They         (1) _______would know that in very cold conditions it becomes a solid calledice and that when heating on a fire it becomes a vapor called steam.       (2) _______However, water, they would say, is a liquid. We have learned thatwater consists of molecules composed with two atoms of hydrogen          (3) _______and one atom of oxygen, which we describe by the formula H2O.This is equally true of the solid called ice and the gas called steam.Chemically there is no difference between the gas, the liquid, andthe solid, all of which is made up of molecules with the formula H2O.       (4) _______This is true of other chemical substances; most of them can exist asgases or as liquids or as solids. We may normally think of iron as asolid, but if we will heat it in a furnace, it will melt and become a       (5) _______liquid, and at very high temperatures it will become a gas. Nothingvery permanent occurs when a gas changes into a liquid or a solid.Everyone knows that ice, which has been made by freezing water,can be melted again by warmed and that steam can be condensed           (6) _______on a cold surface to become liquid water. In fact, it is only becausewater is so a familiar substance that different names are used for        (7) _______the solid, liquid and gas. Most substances are only familiar with         (8) _______us in one state, because the temperatures requiring to turn them         (9) _______into gases are very high, or the temperatures necessary to turn theminto solids are so low. Water is an exception in this respect, whichis another reason why its three states have given three different        (10) _______names.

    正确答案:
    1.like改为as describe sth. as sth.“将……描述成……”,是固定说法。
    2.heating改为heated 此处为时间状语从句,从句和主句主语一致,从句主语和be的变化形式可以省略。
    3.with改为of
    be composed of是固定搭配,意为“包括,由……组成”。
    4.is改为are
    which指代the gas, the liquid, and the solid,表示复数概念,应该用are。
    5.去掉第一个will 在时间条件状语从句和条件状语从句中用现在时表示将来。
    6.by改为when
    when warmed等于when it is warmed,it is可以省略。
    7.so改为such
    so+ adj.+ a(n)+n.和such a(n)+adj.+ n.是固定说法,没有so+ a(n)+ adj. +n.这种说法。
    8.with改为to
    A be familiar to B指“B熟悉A”;A be familiar with B 指“A熟悉B”。
    9.requiring改为required
    temperatures和require是逻辑动宾关系。
    10.have后加been 动词give和主语three states是动宾关系,所以这里要使用被动语态。
    解析: 暂无解析

  • 第9题:

    单选题
    正投影图是()
    A

    用中心投影法绘制的单面投影图

    B

    用平行投影的正投影法绘制的多面投影图

    C

    用平行投影的正投影法绘制的单面投影图

    D

    是在物体的水平投影上加注某些特征面、线以及控制点的高度数值的单面正投影


    正确答案: B
    解析: 暂无解析

  • 第10题:

    单选题
    机械图样中绘制三视图所采用的投影法是()
    A

    中心投影法

    B

    平行投影法

    C

    正投影法

    D

    斜投影法


    正确答案: D
    解析: 暂无解析

  • 第11题:

    多选题
    What are three features of the Cisco IOS Firewall feature set?()
    A

    network-based application recognition (NBAR)

    B

    authentication proxy

    C

    stateful packet filtering

    D

    AAA services

    E

    proxy server

    F

    IPS


    正确答案: A,E
    解析: 暂无解析

  • 第12题:

    填空题
    用正投影法所绘制的物体图形称为()。

    正确答案: 视图
    解析: 暂无解析

  • 第13题:

    According to the last paragraph, the fourth way is "of a different kind" because( )

    [A] the first three ways can increase the water supply, while the fourth one can't

    [B] the first three ways can make a better use of water, while the fourth one can't

    [C] the first three ways is technology-based, while the fourth one is market-based

    [D] the first three ways can't balance the supply and demand of water, while the fourth one can


    正确答案:C

  • 第14题:

    ()可以获得物体的真实形状,且绘制方法也比较简单,已成为机械制图的基本原理和方法。

    • A、中心投影法
    • B、垂直投影法
    • C、正投影法
    • D、三视图法

    正确答案:C

  • 第15题:

    三视图是采用()法绘制的。

    • A、中心投影
    • B、正投影
    • C、斜投影
    • D、侧投影

    正确答案:B

  • 第16题:

    山体分别在水平投影面、正立投影面、侧立投影面上的正投影,即为物体的三视图。


    正确答案:正确

  • 第17题:

    The RECYCLEBIN parameter is set to ON for your database. You drop a table,PRODUCTS,from the SCOTT schema.  Which two statements are true regarding the outcome of this action?()

    • A、 All the related indexes and views are automatically dropped
    • B、 The flashback drop feature can recover only the table structure
    • C、 Only the related indexes are dropped whereas views are invalidated
    • D、 The flashback drop feature can recover both the table structure and its data

    正确答案:C,D

  • 第18题:

    which one of the following best describes the use of hidden column formula?()

    • A、views can be hidden based on a formula 
    • B、hidden columns are not a supported feature 
    • C、table columns can be hidden based on a formula  
    • D、view columns can be displayed or hidden based on a formula 

    正确答案:D

  • 第19题:

    单选题
    We’ll never get to the station on time _____ we run as fast as we can.
    A

    in case

    B

    even if

    C

    provided that

    D

    if only


    正确答案: C
    解析:
    句意:即使我们跑得再快也无法准时到达车站。even if即使。in case假使。provided that如果。if only要是……多好呀,常用于虚拟语气中,表达人的一种愿望。A、C、D这三个选项都用来引导条件状语从句,只有even if引导让步状语从句。所以只有B选项符合题意。

  • 第20题:

    多选题
    The RECYCLEBIN parameter is set to ON for your database. You drop a table,PRODUCTS,from the SCOTT schema.  Which two statements are true regarding the outcome of this action?()
    A

    All the related indexes and views are automatically dropped

    B

    The flashback drop feature can recover only the table structure

    C

    Only the related indexes are dropped whereas views are invalidated

    D

    The flashback drop feature can recover both the table structure and its data


    正确答案: B,D
    解析: 暂无解析

  • 第21题:

    单选题
    We'll do what we can to get the goods____on time, said the manager of the company.
    A

    reached

    B

    delivered

    C

    returned

    D

    come


    正确答案: C
    解析:

  • 第22题:

    问答题
    NBAR is a Cisco IOS feature that can be used to perform three tasks?

    正确答案: (1)Protocol discovery
    (2)Traffic statistics collection
    (3)Traffic classification
    解析: 暂无解析

  • 第23题:

    单选题
    Which tuning tool recommends how to optimize materialized views so that these views can take advantage of the general query rewrite feature?()
    A

    Segment Advisor

    B

    SQL Access Advisor

    C

    Undo Advisor

    D

    SQL Tuning Advisor


    正确答案: B
    解析: 暂无解析

  • 第24题:

    单选题
    Which tuning tool recommends how to optimize materialized views so that these views can take advantage of the general query rewrite feature?()
    A

     Segment Advisor

    B

     SQL Access Advisor

    C

     Undo Advisor

    D

     SQL Tuning Advisor


    正确答案: C
    解析: 暂无解析