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【判断题】
使用直流电源焊接时,电弧阳极区的温度高于电弧阴极区的温度,因此必须将焊件接电源正极,焊条接电源负极。A.
正确
B.
错误
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【简答题】在Excel中,下面合法的公式是A. A.=A3*A4 B. B.=D5+F7 C. F7 C.=A2-C6 D. D.以上都对
【单选题】If we want to reach our goal and truly make_________,we must know what we can do try our best to do well.
A.
a difference
B.
an offer
C.
a construction
D.
a result
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【简答题】Fill in the blanks with the st past or past continuous tense of the verbs. A: What 1_______(you, do) yesterday at 8 pm? B: I 2_______(sit) in the pub with Sam. Why? A: I 3______(drive) to the sp...
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