【单选题】Which of the following is true of the Dow Jones Industrial Average?
A.
It is a value-weighted average of 30 large industrial stocks.
B.
It is a price-weighted average of 30 large industrial stocks.
C.
The divisor must be adjusted for stock splits.
D.
It is a value-weighted average of 30 large industrial stocks and the divisor must be adjusted for stock splits.
E.
It is a price-weighted average of 30 large industrial stocks and the divisor must be adjusted for stock splits.
【单选题】关于车内状况检查,以下说法错误的是( )
A.
检查中央扶手箱盖板是否有划伤,开启关闭是否正常
B.
检查车内后视镜表面是否有损伤,防眩目等功能是否正常
C.
检查中央门锁面板是否有划伤、裂纹;开关功能是否正常;开启小灯后的背光是否均匀有效
D.
制动踏板的踩踏过程应轻松,均匀,力量保持不变
【单选题】计算机只能识别机器语言,而人类熟悉高级语言,故人机通信必须借助()
【单选题】下面 关于车身饰条、密封条、装饰条板的检查内容, 错误 的是( ) 。
A.
顶部饰条:检查确认顶部饰条粘贴牢固,无翘起、破损等情况
【单选题】PLC实质是一种专用于工业控制的微机,其()结构与微机基本相同,主要由CPU、储存器和输入输出接口三部分组成。
【单选题】Dihydrogen monoxide is a very dangerous chemical, which is often used as an industrial solvent.
【单选题】(A number) of foreign visitors (were taken) to the industrial exhibition (which) they (saw) many new products.
【单选题】下列关于维保检查作业中,说法错误的是
A.
为防止第三者进入发生事故,应设置或张贴“无关人员,严禁进入”的标志
B.
进行电气回路检查作业、更改接线,应断开主电源开关,作放电处理后再进行
C.
严禁短接电梯门锁开关、安全回路开关下,进行正常运行(快车运行)
【单选题】关于叉车的使用维护说法错误的是()
A.
行车前应检查车辆行驶证、驾驶证等行车所必需的各种证件,严禁缺证、少证、无证驾驶。
B.
叉车行驶时货叉底端距地高度应保持1000~1200毫米,门架须前倾
D.
检修叉车时,应将变速杆置于空挡,采取制动、掩轮等防护措施