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【单选题】
、自然界产生的电磁辐射,又称为环境电磁波的本底辐射。本底辐射对人类生存环境,无不良影响。“阳光也是一种电磁辐射,亿万年来我们正是依靠阳光的照射才生存到现在。”但是,另外一类电磁辐射源所发射的电磁波,会对环境产生不良影响,对人类健康造成危害。资料显示,环境中的电磁波辐射污染源包括人类发明、制造和使用的能够产生和辐射电磁波的一切电子仪器、装置和设备。这一类电磁辐射源,被称为电磁波辐射污染源。 下列说法与原文不符的是A.
阳光属于本地辐射中的一种
B.
雷达属于电磁波辐射污染源
C.
电磁波不会对人类造成危害
D.
本底辐射对环境无不良影响
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【单选题】无限航区船舶空调舱室冬季湿度多控制在 ____ 范围内即可 A . 30 %~ 40 % B . 50 %~ 60 % C . 60 %~ 70 % D . 70 %以内
A.
B.
C.
D.
D
【单选题】The means that India adopted for achieving independence is ______.
A.
fearless battle
B.
negotiation
C.
nonviolence
D.
vengeance
【简答题】被称为二十世纪西方文化三大发现的是彼得原理、派金森定理和什么定律?
【单选题】听力原文： Officials of the United States and the European Community are continuing to negotiate, trying to solve differences three weeks before the deadline for reaching a new world trade agreement. U. S....
A.
negotiating where to meet again
B.
busy fixing the date to hold talks
C.
doing their best to solve differences
D.
arriving at a local trade agreement
【单选题】The increased demand for their skills has given these workers' greater ______power.
A.
negotiating
B.
bargaining
C.
consulting
D.
debating
【简答题】________ in the company for three years, Mark has become experienced in business negotiations. A) Having worked B) Have been working C) Have worked D) Worked
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