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【判断题】
对角矩阵的特点是非零只出现在矩阵的两条对角线上。
A.
正确
B.
错误
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参考答案:
举一反三
【简答题】如图是“探究导体在磁场中运动时产生感应电流的条件”的实验装置,闭合开关后,铜棒AB、电流表、开关组成闭合电路.小明将实验中观察到的现象记录在下表中. 次数 开关 磁场方向 导体AB的运动方向 电流表指针的偏转方向 1 断开 上N下S 向右运动 不偏转 2 断开 上N下S 向左运动 不偏转 3 闭合 上N下S 向右运动 向左偏转 4 闭合 上N下S 向左运动 向右偏转 5 闭合 上N下S 向上运动 ...
【判断题】促甲状腺素释放激素(TRH),只有促进TSH释放的作用。
A.
正确
B.
错误
【单选题】越野滑雪最长比赛距离为( )?
A.
30
B.
50
C.
90
D.
120
【单选题】Excerpt 1 The process of vaccination allows the patients body to develop immunity to the virus or disease so that, if it is encountered, one can ward it off naturally.To accomplish this, a small weak ...
A.
dispose of it naturally
B.
fight it off with ease
C.
see to it reluctantly
D.
split it up properly
【判断题】期间损益结转凭证生成之前,应先将所有未记账凭证审核并记账
A.
正确
B.
错误
【多选题】What does it take for love to develop into maturity? (multiple choice)
A.
It takes time to blossom.
B.
It takes understanding, caring, sharing and affection to develop.
C.
It takes passion to develop.
D.
It can develop into maturity naturally.
【单选题】天然气的主要成分按含量大小依次是()
A.
丁烷、丙烷、乙烷、甲烷
B.
甲烷、乙烷、丙烷、丁烷
C.
丁烷、乙烷、丙烷、甲烷
D.
甲烷、丙烷、乙烷、丁烷
【单选题】In addition to exploring the possible antecedents of theater, scholars have also theorized about the motives that led people to develop theater. Why did theater develop, and why was it valued after it...
A.
Some theories of theater development focus on how theater was used by group leaders to group leaders govern other members of society.
B.
Theater may have come from pleasure humans receive from storytelling and moving rhythmically.
C.
The human capacities for imitation and fantasy are considered possible reasons why societies develop theater.
D.
Many theorists believe that theater arises when societies act out myths to preserve social well-being.
【单选题】人格形成的重要前提是( )
A.
学习
B.
社会实践
C.
社会条件
D.
先天素质
【判断题】(  )5.电和磁是不可分割的,有电流流动的地方其周围必伴随着磁场的存在。
A.
正确
B.
错误
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