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【单选题】
液压系统的执行元件的运动速度取决于()
A.
液压油的流量
B.
外部负载
C.
液压油的流速
D.
液压系统输出的功率
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参考答案:
举一反三
【单选题】Which theory suggests as product mature, the optimal product location will change.
A.
Mercantilism
B.
Comparative Advantage
C.
Absolute Advantage
D.
Product life-cycle
【单选题】Which of the following statements is true of the new product development process?
A.
The purpose of the idea screening stage is to create a large number of ideas.
B.
Under the business analysis stage, if the new product satisfies the company's objectives, the product then moves to the product development stage.
C.
A product concept is the way consumers perceive an actual or potential product.
D.
The concept testing stage is the stage at which the product and its proposed marketing program are introduced into realistic market settings.
E.
Commercialization is the process of inviting broad communities of people such as customers, employees, and scientists into the new product innovation process.
【判断题】工件的定位基准、测量基准、工序基准必须一致。( )
A.
正确
B.
错误
【判断题】短路电流和开路电压随光照强度增强而增大,短路电流随光照强度呈线性上升,开路电压则呈对数式增大。
A.
正确
B.
错误
【简答题】若f(cosx)=COS 2x,则f(sin 15°)=( )。
【单选题】The Relaxacisor is mentioned as______.
A.
a product which was designed to produce electricity
B.
a product whose distributor was involved in a legal case
C.
a successful advertisement of a beauty product
D.
an example of a quality beauty product
【单选题】天疱疮的激素治疗特点是
A.
急上急下
B.
门腔局部含化即奏效
C.
分为起始、控制、维持等阶段
D.
可以被中药代替
E.
停药后病情不复发
【多选题】由于预警信息系统要完成将原始信息向征兆信息转换的功能,因此要求信息基础管理工作必须满足的条件有( )。
A.
标准化,采集信息过程的计量检测等都应有精确的技术标准
B.
统一化,各类报表、台账、原始凭证都有统一的格式和内容,统一分类编码
C.
规范化,每个工作岗位都需要有明确的责任和定量的要求,信息来源符合一致性要求
D.
程序化,数据的采集、传递和整理都有明确的程序、期限和责任者
E.
信息定量化,显现指标主要用于显现因素或现状信息的定量化
【单选题】下列人最可能属于胆汁质的是()。
A.
沉着、淡漠、情绪发生慢而弱
B.
轻率、敏捷、情绪发生快而多变
C.
孤僻、敏感、情绪发生慢而强
D.
热情、粗暴、情绪发生快而强
【单选题】下列求导运算正确的是(  )
A.
(2 x )′=x?2 x-1
B.
(3e x )′=3e x
C.
(x 2 - 1 x )′=2x- 1 x 2
D.
( x cosx )′= cosx-xsinx (cosx ) 2
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