现场检查项目中对不合格的设备及其组件、材料进行复验时,有抽验比例要求的,应()抽样检

题型:单项选择题

问题:

现场检查项目中对不合格的设备及其组件、材料进行复验时,有抽验比例要求的,应()抽样检查。

A.反复

B.加倍

C.单独

D.按原计划

考点:二级消防工程师第一章通用要求第一章通用要求题库
题型:单项选择题

某患者既往消化性溃疡,主诉上腹部不适,口腔喷射出暗红色血液,并伴有食物残渣,根据以上描述,该患者的症状可能为()。

A.咯血

B.呕血

C.呕吐

D.不确定

题型:单项选择题

下面是某电视专题片中出现的两组镜头,反映了不同朝代为解决洪水灾害,中央政府的运作情况。电视剧甲:蜀郡洪水为患,丞相与诸卿坐着在议事,各自提出自己的处理意见。最后由皇帝决定。电视剧乙:河南府爆发洪灾,内阁的阁臣根据皇帝旨意写成诏书,直送户部、工部执行赈灾。

据所学知识判断,上述历史场景最早出现的朝代分别是[ ]

A.秦、唐

B.汉、宋

C.秦、明

D.明、清

题型:单项选择题

如图所示,劲度数为k的轻弹簧的一端固定在墙上,另一端与置于水平面上质量为m的物体接触(未连接),弹簧水平且无形变,用水平力F缓慢推动物体,在弹性限度内弹簧长度被压缩了x0,此时物体静止,撤去F后,物体开始向左运动,运动的最大距离为4x0,物体与水平面间的动摩擦因数为μ,重力加速度取g,则(    )

A.撤去F后,物体先做匀加速运动,再做匀减速运动

B.撤去F后,物体刚运动时的加速度大小为-μg

C.物体做匀减速运动的时间为

D.物体开始向左运动到速度最大的过程中克服摩擦力做的功为μmg(x0)

题型:单项选择题

在许多机械中,为了获得大的传动比或实现()的要求,常采用由一系列齿轮组成的齿轮机构进行传动。

A.变速

B.增加动力

C.换向

D.减少动力

题型:单项选择题

Left-handed persons suffer more frequently than do righthanded persons from certain immune disorders, such as allergies. Left-handers tend to have an advantage over the righthanded majority, however, on tasks controlled by the right hemisphere of the brain, and mathematical reasoning is ply under the influence of the right hemisphere in most people.
If the information above is true, it best supports which of the following hypotheses

A.Most people who suffer from allergies or other such immune disorders are left-handed rather than right-handed.

B.Most left-handed mathematicians suffer from some kind of allergy.

C.There are proportionally more left-handers among people whose ability to reason mathematically is above average than there are among people with poor mathematical reasoning ability.

D.If a left-handed person suffers from an allergy, that person will probably be good at mathematics.

E.(E) There are proportionally more people who suffer from immune disorders such as allergies than there are people who are left-handed or people whose mathematical reasoning ability is unusually good.

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