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【判断题】
绝缘电阻表使用完毕后,应放在干燥、避光、无振动的场合。
A.
正确
B.
错误
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【单选题】管 道应敷设在当地冰冻线以下,如确实需要高于冰冻线敷设的,须有可靠的保温措施。 在无冰冻地区,埋地敷设时,管顶的覆土埋深不得小于 ( )。
A.
0. 5 m
B.
0.6m
C.
0.7 m
D.
0.8 m
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【单选题】已知集合S={1，2}，集合T={x|(x-1)(x-3)=0}，那么S∪T=(     )
A.
B.
{1}
C.
{1，2}
D.
{1，2，3}
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【简答题】Passage one Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people kee...
查看完整题目与答案
【简答题】Someone says, “ Time is money . ” But I think time is 1 important than money. Why? Because when money is spent, we can get it back. However, when time is 2 , it ’ ll never 3 . That ’ s 4 we mustn ’ t ...
查看完整题目与答案
【单选题】管道应敷设在当地冰冻线以下，如确实需要高于冰冻线敷设的，须有可靠的保温措施。绿化带人行道的管道埋深不低于（），乎路范围内的管道埋深不低于1.2m。
A.
0.8m
B.
0.6m
C.
1.0m
D.
1.2m
查看完整题目与答案
【多选题】有机化合物除含碳、氢元素外,还可能含有( )元素。
A.
硅
B.
氧
C.
氮
D.
氯
E.
磷
F.
硫
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【简答题】有机物X含有碳、氢、氧三种元素。 （1）探究X与钠反应产生气体的成分。 ①X与钠反应产生的气体具有可燃性。将气体点燃，把一干燥的小烧杯罩在火焰上，片刻在烧杯壁上出现液滴，迅速倒转烧杯，向烧杯中加入少量澄清石灰水，未见浑浊。则X与钠反应产生的气体为________。 ②根据苯、乙烷等碳氢化合物不能与钠反应产生上述气体这一事实，可得出X分子里有不同于烃分子里的氢原子存在。即有机物X除含有碳氢键之外，还...
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【单选题】It is the first time that we ________ a film in the cinema together as a family．
A.
see
B.
had seen
C.
saw
D.
have seen
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【简答题】"We never cease to stand like curious children before the great mystery into which we were born."
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【简答题】Dictation: When Captain Cook asked the chiefs in Tahiti why they always ate apart and alone , they replied , “ Because it is right .” If we ask Americans why they eat with knives and forks , or why th...
查看完整题目与答案
相关题目：
【单选题】管 道应敷设在当地冰冻线以下,如确实需要高于冰冻线敷设的,须有可靠的保温措施。 在无冰冻地区,埋地敷设时,管顶的覆土埋深不得小于 ( )。
A.
0. 5 m
B.
0.6m
C.
0.7 m
D.
0.8 m
查看完整题目与答案
【单选题】已知集合S={1，2}，集合T={x|(x-1)(x-3)=0}，那么S∪T=(     )
A.
B.
{1}
C.
{1，2}
D.
{1，2，3}
查看完整题目与答案
【简答题】Passage one Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people kee...
查看完整题目与答案
【简答题】Someone says, “ Time is money . ” But I think time is 1 important than money. Why? Because when money is spent, we can get it back. However, when time is 2 , it ’ ll never 3 . That ’ s 4 we mustn ’ t ...
查看完整题目与答案
【单选题】管道应敷设在当地冰冻线以下，如确实需要高于冰冻线敷设的，须有可靠的保温措施。绿化带人行道的管道埋深不低于（），乎路范围内的管道埋深不低于1.2m。
A.
0.8m
B.
0.6m
C.
1.0m
D.
1.2m
查看完整题目与答案
【多选题】有机化合物除含碳、氢元素外,还可能含有( )元素。
A.
硅
B.
氧
C.
氮
D.
氯
E.
磷
F.
硫
查看完整题目与答案
【简答题】有机物X含有碳、氢、氧三种元素。 （1）探究X与钠反应产生气体的成分。 ①X与钠反应产生的气体具有可燃性。将气体点燃，把一干燥的小烧杯罩在火焰上，片刻在烧杯壁上出现液滴，迅速倒转烧杯，向烧杯中加入少量澄清石灰水，未见浑浊。则X与钠反应产生的气体为________。 ②根据苯、乙烷等碳氢化合物不能与钠反应产生上述气体这一事实，可得出X分子里有不同于烃分子里的氢原子存在。即有机物X除含有碳氢键之外，还...
查看完整题目与答案
【单选题】It is the first time that we ________ a film in the cinema together as a family．
A.
see
B.
had seen
C.
saw
D.
have seen
查看完整题目与答案
【简答题】"We never cease to stand like curious children before the great mystery into which we were born."
查看完整题目与答案
【简答题】Dictation: When Captain Cook asked the chiefs in Tahiti why they always ate apart and alone , they replied , “ Because it is right .” If we ask Americans why they eat with knives and forks , or why th...
查看完整题目与答案
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