【判断题】抽样检验值指从批量为 N 的一批产品中随机抽取其中的一部分单位产品组成样本
【判断题】The Merriam-Webster Learner's Dictionary defines "Public Health" as: "1. The health of people in general. 2. US : the science of caring for the people of a community by giving them basic health care a...
【单选题】具有较高( )电压的焊接电源不仅引弧容易,而且电弧燃烧稳定。
【单选题】上行和下行梯段的扶手在平台转弯处往往存在高差,下列调整和处理哪个是正确的?
A.
当上行和下行梯段在同一位置起止步时,可以把楼梯井处的横向扶手倾斜设置并断开
B.
如果把平台处栏杆外伸约 一个 踏步或将上下梯段错开半个踏步,就可以使扶手顺利连接
C.
如果把平台处栏杆外伸约 半个 踏步或将上下梯段错开一个踏步,就可以使扶手顺利连接
【判断题】具有较高空载电压的焊接电源不仅引弧容易,而且电弧燃烧也稳定。( )
【单选题】听力原文:You have heard the legend about the reputation of the people of Zambia: genuinely warm, extraordinarily friendly and interested in welcoming us to their country. We have had a hand in turning it ...
A.
A professor on tourist economy
B.
An official from Africa
D.
A Zambian tourist guide
【单选题】某采购经理要为企业购买两台设备,现有四家供应商可以提供货源,但价格不同。供应商甲、乙、丙、丁的价格分别为130万元、110万元、140万元、160万元,它们每年所消耗的维护费分别为10万元、20万元、6万元和5万元。假设这些设备的生命周期均为5年,问该经理选择的供应商为()
【单选题】What was the source of the following phrase: "Government of the people, by the people, for the people"?
A.
The speech " I Have a Dream"
B.
Declaration of Independence