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【单选题】
下列化合物中,属于两性物质的是( )A.
HAc
B.
OH -
C.
H 2 O
D.
NH 4 +
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举一反三
【简答题】液氯工段关键装置（）。重点部位：液氯罐区、液氯充装。
【单选题】— Didn't they come to the party last week? — Yes. They didn't want to come with us at first, but then we ________ persuade them. [ ]
A.
would
B.
could
C.
were able to
D.
had to
【单选题】-- Lucy, why didn't you come last Sunday?
A.
I＿＿＿, but my father was in hospital.
B.
would
C.
had
D.
was going to
E.
did
【简答题】‘ --- Lucy didn't come to school, did she?---_______. She was ill and stayed in bed.A. Yes, she did B. No, she did C. No, she doesn't D. No, she didn't
【多选题】下 列 选项中,属于不相容岗位必须相互分离的有
A.
固定资 产登账和原材料登账
B.
货币资金的保管与盘点清算
C.
货币资金的会计记录与审计监督
D.
货币资金支付的审批与执行
E.
总分类账簿登记和明细分类账簿登记
【单选题】关于TATA盒叙述错误的是
A.
看家基因不具有TATA盒结构
B.
是II类启动子的组成部分
C.
受阻遏蛋白调控
D.
与转录的精确起始有关
E.
位于转录起始点上游
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