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【简答题】
One day he went on a long way alone. Before he left home, his wife said, Now you have all these things. You need them on your way. Take care of your things on the way. He went to the station. He bought a ticket and got on the train with it. About an hour later,the conductor began to see the tickets. He came to the old man and said, Will you please show me your ticket? The old man looked for his ticket in all his pockets but he could not find it. He was very worried. I cant find my ticket. I really bought a ticket before I got on the train, said the old man. I think you are right. I believe you bought a ticket. All right,you don’t have to buy another ticket,said the conductor kindly. But the old man still looked worried and said sadly,You don’t know why I’m worried. If I don’t find my ticket,I cant remember my station. Where am I going?
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【单选题】在Centos7中,想要永久修改主机名,可以编辑下面哪个文件?
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/etc/sysconfig/network
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/etc/sysconfig/network/ifcfg
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/etc/sysctemd
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/etc/network
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平面三角形,非极性,N原子采用不等性sp 3 杂化,分子结构对称
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三角锥形,极性,N原子采用不等性sp 2 杂化,分子结构不对称
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正确
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0.5
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0.6
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0.8
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0.2
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A.
CO 2 属非极性分子, H 2 O 、 NH 3 属极性分子
B.
CO 2 、 NH 3 属非极性分子 , H 2 O 属极性分子
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它们均是非极性分子
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Bill Clinton
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John F. Kennedy
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杂货集装笼
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【多选题】在目前的锻炼与焦虑的研究中,常用的测量手段有( )、( )等类似的生理指标测量,血压、心率等心血管生理指标测量。同时,也有学者对焦虑所引发的神经内分泌系统活动产物如儿茶酚胺或皮质醇等进行测量
A.
肌肉紧张程度
B.
肌电
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肌肉活动
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肌纤维
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