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在纯电阻电路中，已知端电压 u=311sin (314t+30 0 )V ，其中 R=l000Ω ，那么电流 [填空(1)] A ，电压与电流的相位差 φ= [填空(2)] ° ，电阻上消耗的功率 P= [填空(3)] W 。
A.
i=0.311 sin (314t+300)
B.
0
C.
48.4
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参考答案：
举一反三
【判断题】时刻保持 导向对是 主持人言论 的基本要求。
A.
正确
B.
错误
查看完整题目与答案
【单选题】My hobby is playing the piano.
A.
习惯
B.
爱好
C.
业余生活
查看完整题目与答案
【简答题】III . 句型转换。(一题多空的用逗号,隔开) 1. We often read books after school. (用 the girl 做主语) The girl often _______ books after school. 2. Playing the piano is my favourite. ( 变为同义句 ) I ________ ________ the piano ...
查看完整题目与答案
【单选题】如果交换机的某个端口下同时开启了基于端口的VLAN、基于MAC地址的VLAN、基于协议的VLAN和基于IP子网的VLAN，则缺省情况下，VLAN将按照顺序进行匹配（）。
A.
端口VLAN>MAC VLAN协议>VLAN IP>子网VLAN
B.
端口VLAN >P子网>VLAN端口>VLAN MAC VLAN
C.
MAC VLAN>端口VLAN>协议VLAN>子网VLAN
D.
MAC VLAN>子网VLAN>协议VLAN>端口VLAN
查看完整题目与答案
【单选题】The boy _____ is playing the piano is a friend of mine. [     ]
A.
whose
B.
who
C.
whom
D.
which
查看完整题目与答案
【单选题】—Must I get there before eight o'clock? —No, you _____.
A.
can't
B.
mustn't
C.
needn't
D.
shouldn't
查看完整题目与答案
【单选题】—Do I have to get up very early tomorrow? —No, you______.
A.
don't need    
B.
shouldn't            
C.
needn't        
D.
don't have
查看完整题目与答案
【单选题】Playing the piano is very(fun).
A.
boring
B.
interesting
C.
busy
查看完整题目与答案
【单选题】—I can't get to sleep at night. —You ____drink coffee at night. [     ]
A.
shoulds
B.
shouldn't
C.
needn't to
D.
may not
查看完整题目与答案
【简答题】VLAN的划分方法可以分为基于______的VLAN，基于__的VLAN，基于____的VLAN，基于组播的VLAN和基于策略的VLAN。
查看完整题目与答案
相关题目：
【判断题】时刻保持 导向对是 主持人言论 的基本要求。
A.
正确
B.
错误
查看完整题目与答案
【单选题】My hobby is playing the piano.
A.
习惯
B.
爱好
C.
业余生活
查看完整题目与答案
【简答题】III . 句型转换。(一题多空的用逗号,隔开) 1. We often read books after school. (用 the girl 做主语) The girl often _______ books after school. 2. Playing the piano is my favourite. ( 变为同义句 ) I ________ ________ the piano ...
查看完整题目与答案
【单选题】如果交换机的某个端口下同时开启了基于端口的VLAN、基于MAC地址的VLAN、基于协议的VLAN和基于IP子网的VLAN，则缺省情况下，VLAN将按照顺序进行匹配（）。
A.
端口VLAN>MAC VLAN协议>VLAN IP>子网VLAN
B.
端口VLAN >P子网>VLAN端口>VLAN MAC VLAN
C.
MAC VLAN>端口VLAN>协议VLAN>子网VLAN
D.
MAC VLAN>子网VLAN>协议VLAN>端口VLAN
查看完整题目与答案
【单选题】The boy _____ is playing the piano is a friend of mine. [     ]
A.
whose
B.
who
C.
whom
D.
which
查看完整题目与答案
【单选题】—Must I get there before eight o'clock? —No, you _____.
A.
can't
B.
mustn't
C.
needn't
D.
shouldn't
查看完整题目与答案
【单选题】—Do I have to get up very early tomorrow? —No, you______.
A.
don't need    
B.
shouldn't            
C.
needn't        
D.
don't have
查看完整题目与答案
【单选题】Playing the piano is very(fun).
A.
boring
B.
interesting
C.
busy
查看完整题目与答案
【单选题】—I can't get to sleep at night. —You ____drink coffee at night. [     ]
A.
shoulds
B.
shouldn't
C.
needn't to
D.
may not
查看完整题目与答案
【简答题】VLAN的划分方法可以分为基于______的VLAN，基于__的VLAN，基于____的VLAN，基于组播的VLAN和基于策略的VLAN。
查看完整题目与答案
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