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【单选题】
谐振功率放大器的动特性曲线如图所示，则电压源电压UCC和交流输出电压uc的振幅Ucm分别为（　）。 【图片】
A.
U CC = 10 V ， U cm = 10 V
B.
U CC = 10 V ， U cm = 9 V
C.
U CC = 10 V ， U cm =8 V
D.
U CC = 8 V ， U cm = 8 V
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【单选题】In Bhutan, about 200 people ______.
A.
have been killed in floods
B.
have been killed in landslides
C.
have drowned in the river
D.
have been killed by diseases caused by floods
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【简答题】小雯同学发现家里有一瓶无标签的无色液体，她为了探究它是何种物质，做了如下实验：把此液体编号为A，在A中加入黑色粉末B，稍微振荡，在常温下就能迅速产生气体C，且B的质量在反应前后没有改变．她把C收集起来，用带火星的木炭伸入盛C的集气瓶中，木条剧烈燃烧．如把黄色粉末D点燃后放入盛C的集气瓶中，能剧烈燃烧，生成一种无色有刺激性气味的气体E． （1）根据小雯的实验，分析A、B、C、D、E分别是什么物质．写...
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【单选题】物质的性质决定物质的用途。下列因果关系不成立的是 [      ]
A.
因为磷燃烧能产生白烟，所以可用于制作烟幕弹
B.
因为金属钨的熔点高，所以被用来制造灯泡中的灯丝
C.
因为碳有还原性，所以高炉炼铁是用焦炭将铁从铁矿石中还原出来的
D.
因为氢氧化钠固体能吸水潮解，所以可用作某些气体的干燥剂
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【单选题】Scholar and students have always been great travelers. The official case for 'academic mobility, is now often stated in impressive terms as a fundamental necessity for economic and social progress in ...
A.
He gains recognition for his achievements.
B.
He attracts large numbers of students.
C.
He risks his ideas being student.
D.
He is considered slightly mad.
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【单选题】What have adults been accustomed to doing concerning young people?
A.
They have been accustomed to carefully considering young people’s views.
B.
They have been accustomed to listening to young people’s voice.
C.
They have been accustomed to taking decisions for young people.
D.
They have been accustomed to promoting young people’s best interest.
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【多选题】关于口腔护理,下列说法正确的是( )
A.
协助患者取头低足高位
B.
使用的棉球不可过湿，防止因水分过多造成误吸。
C.
脱手套后，再次清点棉球数量。
D.
昏迷患者禁止漱口，以免引起误吸。
E.
传染病患者的用物按消毒隔离原则进行处理。
查看完整题目与答案
【简答题】小雯同学发现家里有一瓶无标签的无色液体，她为了探究它是何种物质，做了如下实验：把此液体编号为A，在A中加入黑色粉末C，稍微振荡，在常温下就能迅速产生气体B，且产生了液体D，而C的质量在反应前后没有改变。她把B收集起来，用带火星的木炭伸入盛B的集气瓶中，木条剧烈燃烧。如把黄色粉末E点燃后放入盛B的集气瓶中，能剧烈燃烧，生成一种无色有刺激性气味的气体F。 (1)根据小雯的实验，分析A、B、C、D、E、...
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【简答题】Scientists have been working hard to warn people________
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【单选题】养阴清肺膏用于治疗( )之咳嗽
A.
阴虚肺燥
B.
肺肾阴虚
C.
肾气不固
D.
风热犯肺
E.
风寒犯肺
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【单选题】Scholar and students have always been great travelers. The official case for 'academic mobility' is now often stated in impressive terms as a fundamental necessity for economic and social progress in ...
A.
He gains recognition for his achievements.
B.
He attracts large numbers of students.
C.
He risks his ideas being student.
D.
He is considered slightly mad.
查看完整题目与答案
相关题目：
【单选题】In Bhutan, about 200 people ______.
A.
have been killed in floods
B.
have been killed in landslides
C.
have drowned in the river
D.
have been killed by diseases caused by floods
查看完整题目与答案
【简答题】小雯同学发现家里有一瓶无标签的无色液体，她为了探究它是何种物质，做了如下实验：把此液体编号为A，在A中加入黑色粉末B，稍微振荡，在常温下就能迅速产生气体C，且B的质量在反应前后没有改变．她把C收集起来，用带火星的木炭伸入盛C的集气瓶中，木条剧烈燃烧．如把黄色粉末D点燃后放入盛C的集气瓶中，能剧烈燃烧，生成一种无色有刺激性气味的气体E． （1）根据小雯的实验，分析A、B、C、D、E分别是什么物质．写...
查看完整题目与答案
【单选题】物质的性质决定物质的用途。下列因果关系不成立的是 [      ]
A.
因为磷燃烧能产生白烟，所以可用于制作烟幕弹
B.
因为金属钨的熔点高，所以被用来制造灯泡中的灯丝
C.
因为碳有还原性，所以高炉炼铁是用焦炭将铁从铁矿石中还原出来的
D.
因为氢氧化钠固体能吸水潮解，所以可用作某些气体的干燥剂
查看完整题目与答案
【单选题】Scholar and students have always been great travelers. The official case for 'academic mobility, is now often stated in impressive terms as a fundamental necessity for economic and social progress in ...
A.
He gains recognition for his achievements.
B.
He attracts large numbers of students.
C.
He risks his ideas being student.
D.
He is considered slightly mad.
查看完整题目与答案
【单选题】What have adults been accustomed to doing concerning young people?
A.
They have been accustomed to carefully considering young people’s views.
B.
They have been accustomed to listening to young people’s voice.
C.
They have been accustomed to taking decisions for young people.
D.
They have been accustomed to promoting young people’s best interest.
查看完整题目与答案
【多选题】关于口腔护理,下列说法正确的是( )
A.
协助患者取头低足高位
B.
使用的棉球不可过湿，防止因水分过多造成误吸。
C.
脱手套后，再次清点棉球数量。
D.
昏迷患者禁止漱口，以免引起误吸。
E.
传染病患者的用物按消毒隔离原则进行处理。
查看完整题目与答案
【简答题】小雯同学发现家里有一瓶无标签的无色液体，她为了探究它是何种物质，做了如下实验：把此液体编号为A，在A中加入黑色粉末C，稍微振荡，在常温下就能迅速产生气体B，且产生了液体D，而C的质量在反应前后没有改变。她把B收集起来，用带火星的木炭伸入盛B的集气瓶中，木条剧烈燃烧。如把黄色粉末E点燃后放入盛B的集气瓶中，能剧烈燃烧，生成一种无色有刺激性气味的气体F。 (1)根据小雯的实验，分析A、B、C、D、E、...
查看完整题目与答案
【简答题】Scientists have been working hard to warn people________
查看完整题目与答案
【单选题】养阴清肺膏用于治疗( )之咳嗽
A.
阴虚肺燥
B.
肺肾阴虚
C.
肾气不固
D.
风热犯肺
E.
风寒犯肺
查看完整题目与答案
【单选题】Scholar and students have always been great travelers. The official case for 'academic mobility' is now often stated in impressive terms as a fundamental necessity for economic and social progress in ...
A.
He gains recognition for his achievements.
B.
He attracts large numbers of students.
C.
He risks his ideas being student.
D.
He is considered slightly mad.
查看完整题目与答案
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