| Regardless of the source or kind of
light, the ability of light to form an image is dependent upon just one thing--a
small hole or a lens to bring the rays to a focus. The principle of image
formation was discovered in early Greek Times. Later it was realized that the
eye itself has a lens and that an image is, in fact, formed on the retina, the
rear inside surface of the eyeball. Some man inside a cave or a darkened room
noticed that light entering through a small hole in the wall formed an image on
the far wall. It was observed that if you enlarge the hole, the image blurred
and disappeared. On the other hand, the smaller the hole, the sharper the
image-down to a certain diameter after which making the hole smaller makes the
image worse again. The function of a pinhole is to screen out all light rays except those coming in a p A. was discovered by Battista della Porta in 1589 B. was not understood until the first lens had been manufactured C. is independent of the presence or absence of a lens or pinhole D. was demonstrated by a human eye [单选题]链条葫芦起吊过程中严禁( )在重物下行走或停留。
A.工作人员 B.非操作人员 C.任何人 D.路人 [单选题]茶艺表演中“高冲低斟”技法用于()。
A.乌龙茶 B.绿茶 C.红茶 D.紧压茶 [简答题]变电运维人员需要现场勘查时，勘查记录包括什么
[判断题]大型项目采取“班组自验收+指挥部验收+领导小组验收”的三级验收模式。
A.正确 B.错误 [判断题]使用钻孔机钻孔,架设时不要一次性将钻架固定,以便钻孔过程中调整钻头。( )
A.正确 B.错误 [多项选择]双赢关系的评价重点就是在零和博弈关系评价内容的基础上，重点增加对（）等多项指标的考核评估。
A. 供应商价格水平高低 B. 供应商组织架构 C. 产品制造成本 D. 持续供应能力 [判断题]171. 水带铺设应平直、沿路边设置，跨越道路时垂直铺设，并应设置水带护桥，参战人员不得站立于打圈水带之间，不得缠绕身体。（ ）
A.正确 B.错误 [简答题]台阶法施工工艺根据地质及开挖断面主要有哪些类型？
[单项选择]下列城市工程管线，哪一种管线最宜采用环状管网布局形式（）。
A. 雨水管 B. 污水管 C. 热力管 D. 给水管 [判断题]活塞运动四个冲程，曲轴旋转360°完成一个工作循环的柴油机称为四冲程柴油机。
[判断题]往复压缩机吸入气体温度升高，会导致压缩机生产能力提高。
A.正确 B.错误 [简答题]如何评价中国的社会保障改革？
[单项选择]证券登记结算公司按照业务规则收取的各类结算资金和证券，必须存放于( )，只能按业务规则用于已成交的证券交易的清算、交收，不得被强制执行。
A. 专门的清算交收账户 B. 商业银行 C. 专门的银行托管账户 D. 证券交易所 [单项选择]在建设项目人力资源管理中，职位分析是______环节的主要工作内容之一。
A. 人员任用 B. 组织规划 C. 团队能力开发 D. 绩效管理 [单选题]PPM是指（）
A.预防性维修 B.预测性维修 C.预防性&预测性维修 D.启动前安全检查 [单项选择]
每题所给选项中有一个或一个以上正确答案。
A. 贪污罪 B. 职务侵占罪 C. 诈骗罪 D. 侵占罪 [单选题] 正文中的一级标题应为( )三号字。
A.黑体 B.楷体 C.方正小标宋简体 D.宋体 [单项选择]Though it is mere 1 to 3 percent of the population, the upper class possesses at least 25 percent of the nation’s wealth. This class has two segments: upper-upper and lower-upper. Basically, the upper-upper class is the "old rich"—families that have been wealthy for several generations—an aristocracy of birth and wealth. Their names are in the Social Register, a listing of acceptable members of high society. A few are known across the nation, such as the Rockefellers, Roosevelts, and Vanderbilts. Most are not visible to the general public. They live in grand seclusion, drawing their income from the investment of their inherited wealth. In contrast, the lower-upper class is the "new rich". Although they may be wealthier than some of the old rich; the new rich have hustled to make their money like everybody else beneath their class. Thus their prestige is generally lower than that of the old rich, who have not found it necessary to lift a finger to make their money, and who tend to look
A. the upper-upper class is of aristocratic origin B. the "old rich" enjoy higher prestige than the "new rich" C. the "old rich" isolate themselves and lead a lonely life D. the upper class owns at least a quarter of the country’s wealth [判断题]风险评价是指评估风险程度以及确定风险是否可容许的全过程。
A.正确 B.错误 [判断题]倒闸操作前、后，都应检查核对现场设备名称、编号和断路器（开关）、隔离开关（刀闸）的分、合位置。
A.正确 B.错误 [单选题]___________where the sound laboratory9
A.Has it decided; will build B.Will it be decided; will be built C.Has it been decided; will be built D.Is it decided; is built [判断题]在接地线与接地极断开后，禁止触及接地线。
A.正确 B.错误 [判断题]电工、高空作业特种作业操作证应于证书注明的复审期满3个月前向复审机构提出复审申请，逾期证书自动作废。
A.正确 B.错误 [名词解释]副性征（第二性征）
[多选题]公安民警对违法犯罪行为人实施人身安全检查，现场条件允许的，应当选择具备（ ）特点的地点。
A.光线较好 B.场地开阔 C.有依托 D.容易得到支援 [单选题] 根据《建设工程安全生产管理条例》,在( )内的建设工程,施工单位应当对施工现场实行封闭围挡。
A.城镇 B.城市市区 C.城乡 D.乡村 [判断题]协调控制方式既能保证有良好的负荷跟踪性能,又能保证汽轮机运行的稳定。( )
A.正确 B.错误 [多项选择]所谓建设程序是指一项建设工程从设想提出到决策，经过设计、施工直至投产或交付使用的整个过程中，应当遵循的( )。
A. 国家规定 B. 管理制度 C. 工作程序 D. 内在规律 [判断题]110kV变压器充电时，变压器110kV中性点应接地。
A.正确 B.错误 [单选题]病人徐女士上午行子宫切除术术前留置尿管护士在操作过程中应为病人安置的体
A.去枕仰卧位 B.屈膝仰卧位 C.膝胸位 D.头高足低位 E.头低足高位 我来回答: 提交
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