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【单选题】
设A为n阶方阵,且 ,则A的n个行向量中( )A.
必有r个行向量线性无关
B.
任意r个行向量线性无关
C.
任意r个行向量都构成最大无关组
D.
任意一个行向量都可由其它r个行向量线性表示
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【简答题】Will there always be 31 water? When you consider how necessary water is to each and every one of us and to all 32 (live) things, and when you observe how man has mismanaged other 33 (nat...
【单选题】客户补办新号码证券账户卡时,开户经办岗将证券账户卡挂失补办的信息正确录入系统,向( )实时传送相关信息。
A.
指定存管银行
B.
证券交易所
C.
登记公司
D.
证券监督管理委员会
【简答题】请大家朗读第一单元单词表里所有的单词,每个词读两遍。
【单选题】It’s not necessary to explain the truth________ there are air, water and sunlight , there are living things.
A.
in wherever
B.
that wherever
C.
which
D.
that
【单选题】Feed water heaters are necessary for ( ) to increase its efficiency
A.
the generator
B.
the boiler
C.
the main engine
【单选题】Since lubricating oils and jet fuels are acutely water critical，it is necessary to effect full line draining and mopping up of any water in tanks before loading ______．
A.
purging with hydrocarbon gas
B.
gas-freeing operations
C.
maintaining an inert condition
D.
full line draining and mopping up of any water
【简答题】请朗读以上单词,每个单词读两遍。
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