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【多选题】
进行喷涂作业流程时应穿戴的防护用具都有
A.
活性炭防护口罩； 供气式防护面罩
B.
耳塞或耳罩
C.
防尘口罩
D.
防护眼镜
E.
防溶剂手套； 橡胶手套； 棉纱手套
F.
安全工作鞋
G.
喷漆工作服
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参考解析：
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【单选题】Much of Africa moved right into the Iron Age, taking the basic technology and adapting it to local; conditions and resources. Unlike in the Americas, where metallurgy was a very late and limited devel...
A.
¨While American iron makers developed the latest furnaces, African iron makers continued using earlier techniques.
B.
¨Africans produced iron much earlier than Americans, inventing technologically sophisticated heating systems.
C.
¨Iron making developed earlier in Africa than in the Americas because of the ready availability of carbon and iron ore.
D.
¨Both Africa and the Americas developed the capacity for making iron early, but African metallurgy developed at a slower rate.
查看完整题目与答案
【单选题】听力原文： It was a hot afternoon in September 1963. A small party of engineers in a truck were exploring, looking for oil in the southeastern desert of Libya. They were about four hundred miles south of t...
A.
At dawn.
B.
At sunset.
C.
In the middle of the day.
D.
In the afternoon.
查看完整题目与答案
【单选题】A ball of clay falls freely to the hard floor. It does not bounce noticeably, and it very quickly comes to rest. What, then, has happened to the energy the ball had while it was falling?
A.
It has been used up in producing the downward motion.
B.
It has been transformed back into potential energy.
C.
It has been transferred into the ball by heat.
D.
It is in the ball and floor (and walls) as energy of invisible molecular motion.
查看完整题目与答案
【简答题】Benjamin Franklin and his inventions Benjamin Franklin was a very talented man. He invented man yuseful things. We still use some of them nowadays. In the 1740s Franklin invented the Pennsylvania Fire...
查看完整题目与答案
【多选题】我国新课改下的'三维目标'包括( )
A.
知识与技能目标
B.
应用技能目标
C.
过程与方法目标
D.
情感态度与价值观目标
查看完整题目与答案
【多选题】事务所具有的特性有【选4项】
A.
原子性
B.
一致性
C.
隔离性
D.
持久性
查看完整题目与答案
【单选题】功效清热解毒,凉血止痢,尤善于清胃肠湿热及血分热毒,为治热毒血痢的良药是指:
A.
黄连
B.
白头翁
C.
红藤
D.
白花蛇舌草
E.
蚤休
查看完整题目与答案
【单选题】功效清热解毒,凉血止痢,尤善于清胃肠湿热及血分热毒,为治热毒血痢的良药是指
A.
黄连
B.
白头翁
C.
红藤
D.
白花蛇舌草
查看完整题目与答案
【简答题】All electronic computers are made up of four basic units although they may be of different kinds. ( ) 2. The moment I saw it clearly for what it was — a dead fish — I threw it away immediately....
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【单选题】关于细胞靜息电位的论述，不正确的是（  ）
A.
静息电位与膜两侧Na+-K+泵的活动有关
B.
静息电位主要是由K+内流形成的
C.
细胞膜处于极化状态
D.
细胞在靜息状态时处于外正内负的状态
E.
静息状态下，细胞膜对K+通透性増高
查看完整题目与答案
相关题目：
【单选题】Much of Africa moved right into the Iron Age, taking the basic technology and adapting it to local; conditions and resources. Unlike in the Americas, where metallurgy was a very late and limited devel...
A.
¨While American iron makers developed the latest furnaces, African iron makers continued using earlier techniques.
B.
¨Africans produced iron much earlier than Americans, inventing technologically sophisticated heating systems.
C.
¨Iron making developed earlier in Africa than in the Americas because of the ready availability of carbon and iron ore.
D.
¨Both Africa and the Americas developed the capacity for making iron early, but African metallurgy developed at a slower rate.
查看完整题目与答案
【单选题】听力原文： It was a hot afternoon in September 1963. A small party of engineers in a truck were exploring, looking for oil in the southeastern desert of Libya. They were about four hundred miles south of t...
A.
At dawn.
B.
At sunset.
C.
In the middle of the day.
D.
In the afternoon.
查看完整题目与答案
【单选题】A ball of clay falls freely to the hard floor. It does not bounce noticeably, and it very quickly comes to rest. What, then, has happened to the energy the ball had while it was falling?
A.
It has been used up in producing the downward motion.
B.
It has been transformed back into potential energy.
C.
It has been transferred into the ball by heat.
D.
It is in the ball and floor (and walls) as energy of invisible molecular motion.
查看完整题目与答案
【简答题】Benjamin Franklin and his inventions Benjamin Franklin was a very talented man. He invented man yuseful things. We still use some of them nowadays. In the 1740s Franklin invented the Pennsylvania Fire...
查看完整题目与答案
【多选题】我国新课改下的'三维目标'包括( )
A.
知识与技能目标
B.
应用技能目标
C.
过程与方法目标
D.
情感态度与价值观目标
查看完整题目与答案
【多选题】事务所具有的特性有【选4项】
A.
原子性
B.
一致性
C.
隔离性
D.
持久性
查看完整题目与答案
【单选题】功效清热解毒,凉血止痢,尤善于清胃肠湿热及血分热毒,为治热毒血痢的良药是指:
A.
黄连
B.
白头翁
C.
红藤
D.
白花蛇舌草
E.
蚤休
查看完整题目与答案
【单选题】功效清热解毒,凉血止痢,尤善于清胃肠湿热及血分热毒,为治热毒血痢的良药是指
A.
黄连
B.
白头翁
C.
红藤
D.
白花蛇舌草
查看完整题目与答案
【简答题】All electronic computers are made up of four basic units although they may be of different kinds. ( ) 2. The moment I saw it clearly for what it was — a dead fish — I threw it away immediately....
查看完整题目与答案
【单选题】关于细胞靜息电位的论述，不正确的是（  ）
A.
静息电位与膜两侧Na+-K+泵的活动有关
B.
静息电位主要是由K+内流形成的
C.
细胞膜处于极化状态
D.
细胞在靜息状态时处于外正内负的状态
E.
静息状态下，细胞膜对K+通透性増高
查看完整题目与答案