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【多选题】
对开关、插座的电气和机械性能进行现场抽样检测。检测规定如下: 。
A.
不同极性带电部件间的电气间隙和爬电距离小不于3mm
B.
绝缘电阻值不小于5MΩ
C.
绝缘电阻值不小于2MΩ
D.
螺钉与软塑固定合长度不小于8mm
E.
金属间合的螺钉螺母,拧紧后完全退出,反复10次仍能正常使用。
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举一反三
【单选题】Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators pr decayed by bacte...
A.
is not likely to appear in the fossil record
B.
is not heavy enough to sink below the surface
C.
is not attractive to predators
D.
takes a long time to decay
【单选题】单电源供电单母线式主接线,适用于( )千伏供电的一般用户。(1分)
A.
1
B.
10
C.
35
D.
110
【单选题】蓬勃发展,动漫文化元素在生活中被广泛使用
A.
动画形象
B.
少儿文化
C.
亚健康
D.
青年亚文化
【单选题】单电源供电单母线式主接线,适用于()千伏供电的一般用户。
A.
1
B.
10
C.
35
D.
110
【单选题】以下谁是环境决定论的代表人
A.
霍尔
B.
高尔顿
C.
桑代克
D.
华生
【简答题】English is now the international language for airline pilots, scientists, medical experts, businessmen and many others. Consequently, more and more people are learning it.
【单选题】Many experts have realized that the current medical system needs ________ to meet the needs of our increasingly aging population. [      ]
A.
reforming
B.
inspecting
C.
forming
D.
achieving
【单选题】以下谁是环境决定论的代表人物?
A.
霍尔
B.
高尔顿
C.
桑代克
D.
华生
【单选题】In time, the fossil fuel waves may come to be seen as something of a historical blip.
A.
F
B.
O
【单选题】Food and Cancer Medical Experts have suspected for many years that there is a strong link between what a person eats and cancer. They say a new study provides the first evidence that vitamins could re...
A.
Right
B.
Wrong
C.
Not Mentioned
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