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【单选题】
电气设备是具有能承受内部的爆炸性混合物的爆炸而不致受到损坏，而且通过外壳任何结合面或结构孔洞，不致使内部爆炸引起外部爆炸性混合物爆炸的电气设备。该电气 设备属于( )。A.
增安型
B.
本质
C.
隔爆型
D.
充油型
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【简答题】Leaders like John F. Kennedy and Martin Luther King have made important contributions to the people of the United States. Name another world leader you think is important. Give specific reasons for yo...
【单选题】Which American president was at the same time period with Martin Luther King Jr.?
A.
John Kennedy
B.
Abraham Lincoln
C.
George Washington
D.
Ronald Reagan
【简答题】卷的注意事项有哪些?卷的种类
【单选题】John Martin trusted people easily because
A.
he was good-hearted and liked to cooperate with other people in his work.
B.
he was hardly aware of the possible danger.
C.
he was at a loss for the fact that industrial spying was on the increase.
【单选题】______ was known for his famous speech '1 Have a Dream'.
A.
John F. Kennedy
B.
Martin Luther King, Jr
C.
Abraham Lincoln
D.
Thomas Jefferson
【简答题】What is the purpose of Martin Blade's visit?
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