共轭二烯烃在己烷溶剂中1.png =219nm,改用乙醇作溶剂时λmax 比21...

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共轭二烯烃在己烷溶剂中1.png =219nm,改用乙醇作溶剂时λmax 比219nm______, 原因是该吸收是由_________跃迁引起,在乙醇中,该跃迁类型的激发态比基态的稳定性_______。

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举一反三

【单选题】Choose the best answer to each of the following questions according to what is sated or implied in Text B. In dealing with the general insecure working environment, the author’s attitude is .

pessimistic

favorable

proactive

sarcastic

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【单选题】Decide which of the following best states the author’s purpose.

To offer a general view on the merits and demerits of online writing and related matters.

To express his disapproval of the foolish and trivial writings on the internet.

To give a historical review on netwriting and its impact on younger generations.

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【简答题】某企业出售一座建筑物，原值3000000元，已经计提折旧450000元。出售价格为2800000元，已通过银行收回款项。营业税税率5％。编制固定资产转入清理、收到出售价款、计算营业税和结转清理净损益的会计分录。(8分)

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【判断题】碎屑岩按碎屑物质的成因、成分和结构的特点,划分为两个亚类:正常碎屑岩、火山碎屑岩。

正确

错误

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【简答题】碎屑岩的物质组成主要由（）和（）两大部分构成。

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【单选题】对于酸碱指示剂, 全面而正确的说法是 :

指示剂为有色物质;

指示剂为弱酸或弱碱;

指示剂为弱酸或弱碱, 其酸式或碱式结构具有不同颜色;

指示剂在酸碱溶液中呈现不同颜色答( )

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【单选题】The author’s primary objective in the passage is to______

disprove the view that federal efforts to aid minority businesses have been ineffective

explain how federal efforts to aid minority businesses have changed since the 1960’s

establish a direct link between the federal efforts to aid minority businesses made before the 1960’s and those made in the 1980’s

analyze the basis for the belief that job-specific experience is more useful to minority businesses than is general management experience

argue that the “social responsibility approach” to aiding minority businesses is superior to any other approach

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【单选题】In the author’s opinion, advertising

emerges in the wake of the anti-happy part.

is a cause of disappointment for the general peer

replace the church as a major source of information

creates an illusion of happiness rather than happiness itself.

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【单选题】在距离向量路由选择中,每一个路由器从_________直接接收信息。

网络上的每一个路由器

相距小于两个单位的每一个路由器

网络上的主机所存储的表中

仅仅是它的邻站

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【单选题】对于酸碱指示剂,全面而正确的说法是( )

指示剂为有色物质

指示剂为弱酸或弱碱,其酸式或碱式结构具有不同颜色

指示剂为弱酸或弱碱

指示剂在酸碱溶液中呈现不同颜色

查看完整题目与答案

相关题目：

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【单选题】Decide which of the following best states the author’s purpose.

To offer a general view on the merits and demerits of online writing and related matters.

To express his disapproval of the foolish and trivial writings on the internet.

To give a historical review on netwriting and its impact on younger generations.

查看完整题目与答案

【判断题】碎屑岩按碎屑物质的成因、成分和结构的特点,划分为两个亚类:正常碎屑岩、火山碎屑岩。

正确

错误

查看完整题目与答案

【简答题】碎屑岩的物质组成主要由（）和（）两大部分构成。

查看完整题目与答案

【单选题】对于酸碱指示剂, 全面而正确的说法是 :

指示剂为有色物质;

指示剂为弱酸或弱碱;

指示剂为弱酸或弱碱, 其酸式或碱式结构具有不同颜色;

指示剂在酸碱溶液中呈现不同颜色答( )

查看完整题目与答案

【单选题】The author’s primary objective in the passage is to______

disprove the view that federal efforts to aid minority businesses have been ineffective

explain how federal efforts to aid minority businesses have changed since the 1960’s

establish a direct link between the federal efforts to aid minority businesses made before the 1960’s and those made in the 1980’s

analyze the basis for the belief that job-specific experience is more useful to minority businesses than is general management experience

argue that the “social responsibility approach” to aiding minority businesses is superior to any other approach

查看完整题目与答案

【单选题】In the author’s opinion, advertising

emerges in the wake of the anti-happy part.

is a cause of disappointment for the general peer

replace the church as a major source of information

creates an illusion of happiness rather than happiness itself.

查看完整题目与答案

【单选题】在距离向量路由选择中,每一个路由器从_________直接接收信息。

查看完整题目与答案

【单选题】对于酸碱指示剂,全面而正确的说法是( )

指示剂为有色物质

指示剂为弱酸或弱碱,其酸式或碱式结构具有不同颜色

指示剂为弱酸或弱碱

指示剂在酸碱溶液中呈现不同颜色

查看完整题目与答案

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