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【单选题】
在锅炉压力容器压力管道焊工考试中代号SMAW代表( )
A.
钨极气体保护焊
B.
熔化极气体保护焊
C.
焊条电弧焊
D.
埋弧焊
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【判断题】在三相三线系统中,三相短路时导体所受到的电功力最大;在三相四线系统中,单相短路时导体所受的电功力最大。
A.
正确
B.
错误
【单选题】We have already _ much water to the people in the south of China. [     ]
A.
given in
B.
given up
C.
given away
D.
given out
【单选题】They keys were __________ to our neighbours during our absence.
A.
given out
B.
given away
C.
given over
D.
given up
【简答题】ENTRY-EXIT INSPECTION AND QUARANTINE THE PEOPLE'S REPUBLIC OF CHINA HEALTH AND QUARANTINE DECLARATION FORM ON ENTRY Name:Shirley Booth : Male Female Birth Date:1959 yy 02 mm Place of Arrival: Shenz...
【单选题】关于三相电描述错误的是( )
A.
三相电各相有效值相等
B.
三相电各相频率相等
C.
三相电各相初相位相同
D.
三相电各相相位差为120 0
【判断题】在线路设计施工时,不论土壤特性如何,所有混凝土电杆基础都必×须采用底盘、卡盘、拉盘基础。( )
A.
正确
B.
错误
【单选题】An English speech _____ to the children tomorrow. [     ]
A.
is given
B.
has been given
C.
will be given
【简答题】验电时,不能将一相无电作为三相无电的依据。()
【单选题】More than one answer                to the question.
A.
have been given
B.
has been given
C.
were given
D.
had given
【简答题】挂 失 止 付 是 票 据 丧 失 后 必 须 采 取 的 措 施 。 ( )
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