[单选题]需停电更换主机设备或存储设备的内部板卡等配件的工作，断开外部电源连接线后，可不做防静电措施。(  )
A.正确　
B.错误

[单选题]天车车轮轮缘磨损量达到原厚度的( )时,应报废。
A.30%
B.40%
C.50%
D.60%

[单项选择]关于马蹄肾的描述，下列错误的是（）
A. 左右肾下极联合
B. 易并发肾肿瘤
C. 有多根肾动脉
D. 偶见左右肾上极联合
E. 左右输尿管自肾门通过肾联合

[简答题]清朝将领吴三桂之子，金庸小说《鹿鼎记》中建宁公主奉旨下嫁的人是谁？

[判断题]单向调节器应加强尖轨及其后50～100m范围内钢轨的锁定，该范围内如有小阻力扣件，小阻力扣件按照设计扭矩拧紧。
A.正确
B.错误

[判断题]安全工器具使用前，应检查确认绝缘部分无裂纹、无老化、无绝缘层脱落、无严重伤痕等现象以及固定连接部分无松动、无锈蚀、无断裂等现象。对其绝缘部分的外观有疑问时应经绝缘试验合格后方可使用。
A.正确
B.错误

[判断题]产生雷暴的积雨云叫做雷暴云,单个雷暴云称为一个雷暴单体。每个雷暴单体的生命史大
致可分为发展.成熟和消散三个阶段。
A.正确
B.错误

[单选题]翻板时轻起轻落，超过（ ）长钢板注意翻板机同步
A.10m
B.12m
C.15m
D.20m

[多选题]保护间隙是一种简单的避雷器，按其形状可分为：( )。
A.球型
B.角型
C.棒形
D.环形

[简答题] LED照明模块的驱动是有驱动电源实现的,其输入电压为
,输出电压为

[单项选择]Advanced technology has already pushed human being to edges, such as the production of weapons of mass destruction, the destruction of Ozone by Freon, and the application of clone. The heated debate over (67) cloning technique should be used in human reproduction must be considered as a serious (68) .
Clone, to a certain degree, is (69) to mankind. Such disease as Parkinsons will (70) be cured in the future in the hope of further (71) of clone. However, the (72) of this technology will bring human being unthinkable destruction.
(73) the declaration of the death of Dolly, we are more (74) of the inefficient procedure of clone. According to "Dolly’s false legacy", the incidence of death among offspring (75) by cloning is much higher than it is (76) natural reproduction--roughly 10 times as high as (77) before birth and 3 times as high after birth. And
A. how
B. whether
C. when
D. where