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【单选题】
不改变行列式值的变换是( )
A.
互换两行
B.
非零数乘某一行
C.
某行某列互换
D.
非零数乘某一行加到另外一行
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参考答案:
举一反三
【单选题】If they hadn't spent all the money on the stocks, their life ______ so miserable at the moment.
A.
would not have been
B.
will not have been
C.
are not
D.
would not be
【单选题】If they hadn't spent all the money on the lottery, their life ______ so miserable at the moment.
A.
would not have been
B.
will not have been
C.
are not
D.
would not be
【单选题】制作植物腊叶标本正确顺序是
A.
整形、干燥、压制、装订标本处理
B.
整形、压制、干燥、装订标本处理
C.
压制、整形、干燥、装订标本处理
D.
压制、整形、干燥、装订标本处理
【单选题】某企业销售生产的商品确认销售成本100万元,销售原材料确认销售成本10万元,发生现金折扣1.5万元,不考虑其他因素,该企业记入“其他业务成本”科目的金额为( )
A.
100
B.
110
C.
10
D.
11.5
【单选题】Teenagers shouldn' t be ______ from school although they don' t do well in studies.
A.
disappeared
B.
gone
C.
removed
D.
beaten
【单选题】Mother insisted that ______.
A.
they are to be back before nine in the evening
B.
they ought to be back before nine in the evening
C.
they be back before nine in the evening
D.
they had to be back before nine in the evening
【简答题】If they hadn't spent all the money on the stocks, their life ___ so miserable at the moment. A) would not have been B) will not have been C) are not D) would not be
【单选题】某企业销售生产的商品确认销售成本100万元,销售原材料确认销售成本10万元,发生现金折扣1.5万元。不考虑其他因素,该企业记入到“其他业务成本”科目的金额为( )万元。
A.
100
B.
110
C.
10
D.
11.5
【简答题】In America, when people say ‘man’s best friend’, they don’t mean another person. Instead, they are talking about a lovely animal—a dog! These words show the friendship between people and animals. Dogs...
【单选题】《铁路客运运价里程表》中,计算里程方法为;发站和到站在同一线路时( )
A.
用本线起点站或终点站至发站不和到站的运价里程相加
B.
用本线起点站或终点站至发站和到站的运价里程相减
C.
用本线起点站或终点站的里程通算点站的里程通算
D.
用发站和到站的运价里程相加
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