皮皮学，免费搜题
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【单选题】
throttle的意思是A.
节气门
B.
进气歧管
C.
排气歧管
D.
空气滤清器
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皮皮学刷刷变学霸
举一反三
【简答题】x(t) 的频谱是 X(f) , y(t) 的频谱是 Y(f) ,若在时域内 x(t) 与 y(t) 应作 卷积运算, 则对应在频域内 X(f) 与 Y(f) 作 运算 。
【单选题】There is little need for marketing in the place such as a subsistence farm, because ______.
A.
the goods are used directly by its producer there
B.
the division of labour is developed there
C.
there are few consumers there
D.
their production is distributed widely
【简答题】When one considers our world from such a compressed ________, the need for acceptance, understanding and education becomes glaringly apparent.
【简答题】x（t）的频谱是X（f），y（t）的频谱是Y（f），若在频域内X（f）与Y（f）作相乘运算，则对应在时域内x（t）与y（t）应作（）
【单选题】有机磷中毒给予解磷定治疗,主要针对下列哪组症状 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
心动过缓，血压下降
B.
大小便失禁
C.
头痛、头昏、谵妄、烦躁 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
D.
肌群颤动，全身紧束感
E.
肺部湿罗音
【判断题】Only when the process of meeting the basic need for food reached a certain level of sophistication it was possible for humans to follow other pursuits such as the founding of cities.
A.
正确
B.
错误
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