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【单选题】
皮肤变黑主要是由哪种紫外线引起()
A.
中波紫外线
B.
长波紫外线
C.
中长波紫外线
D.
短波紫外线
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【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】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
B.
车门 窗台外侧密封条( 有无 )
C.
检查 确认窗框密封条无开裂、变形
D.
确认 前后车身上的标牌等清晰、正确
【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。
A.
软件
B.
组件
C.
硬件
D.
软硬件
【单选题】Dihydrogen monoxide is a very dangerous chemical, which is often used as an industrial solvent.
A.
Y
B.
N
C.
NG
【单选题】(A number) of foreign visitors (were taken) to the industrial exhibition (which) they (saw) many new products.
A.
A number
B.
were taken
C.
which
D.
saw
【单选题】According to paragraph 1, which of the following statements is TRUE?
A.
Industrial revolution made men and women unequal.
B.
Industrial revolution made men and women equal.
C.
Industrial revolution made men and women more unequal.
D.
Industrial revolution made men and women more equal.
【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)
D.
可以对电梯进行改造作业
【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
C.
在货叉升降时,叉车起重架应与地面平行
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
【多选题】下列关于疏散出口检查内容的叙述中,错误的是( )。
A.
公共建筑内务房间疏散门的数量不少于2个
B.
对于公共建筑内的疏散门和住宅建筑户门,其净宽度不小于1m
C.
疏散门的形式根据建筑类别、使用性质进行确定
D.
每个房间相邻的两个疏散门最近边缘之间的水平距离不小于6m
E.
除甲、乙类生产车间外,人数不超过60人且每道1门的平均疏散人数不超过30人的房间,其疏散门的开启方向不限
【单选题】(A number of) foreign visitors (were taken) to the industrial exhibition (which) they (saw) many new products.
A.
A number of
B.
were taken
C.
which
D.
saw
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