实践表明,()良善的制度设计,住房保障已不再是政府的财政包袱,相反,它还是经济增长的

题型:单项选择题

问题:

实践表明,()良善的制度设计,住房保障已不再是政府的财政包袱,相反,它还是经济增长的()。住房保障本身已表现出一种强大可持续的生命力,并成为能够产生稳定回报的投资品。填入括号部分最恰当的一项是()。

A.基于;机遇

B.出于;动力

C.由于;前提

D.鉴于;表现

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关于转运RNA和氨基酸之间相互关系的说法,正确的是  [ ]

A.一种tRNA可以携带几种结构上相似的氨基酸 

B.每种氨基酸都有它特定的一种转运RNA  

C.每种氨基酸都可由几种tRNA携带

D.一种氨基酸可由一种或几种特定的tRNA来将它带到核糖体上

题型:单项选择题

物质A-L之间的转化关系如图,部分反应物和生成物及反应条件已省略。化合物A是由三种元素组成的一种矿石的主要成分。A在氧气中高温煅烧生成B、C、D。B为砖红色固体,D、I均为红色固体,E、I、K是三种常见金属,其中组成E的元素是地壳中含量最高的金属元素。L可作净水剂,向L溶液中加入BaCl2溶液,会生成不溶于稀硝酸的白色沉淀,H溶液呈蓝色。

请回答下列问题:

(1)写出E和G的化学式:E__________ 、G_________。

(2)L可用作净水剂的原因是__________ (用离子方程式表示)。

(3)写出B和G反应的化学方程式____________________。

(4)D+E→K+J的反应中放出大量的热,这类反应被称为__________反应,举出这类反应的一个应用实例:__________。

(5)A的相对分子质量为184,A与O2反应得到B、C、D三种物质的物质的量之比为1︰4︰1,某种检验葡萄糖的反应中含有B生成,则A的化学式为__________。

(6)过量的I与含n molG的浓G溶液共热生成m molC,若给反应后的溶液中加入足量的K的粉末,则溶解掉K的质量为__________g(用含n和m的代数式表示)。 

题型:单项选择题

不属于社会调查方法的是()

A、观察法

B、问卷调查法

C、文献阅读法

D、邮寄法

题型:单项选择题

Shopping for clothes is not the same experience for a man as it is for a woman. A man goes shopping because he needs something. He knows what he wants, and his purpose is to find it and buy it, the price is a less important consideration. All men simply walk into a shop and ask the assistant for what they want. If the shop has it, the salesman immediately produces it, and the business of trying it on is done at once. All being well, the bargain (交易) can be and often is completed in less than five minutes, with hardly any chat and to everyone’s satisfaction.

For a man, slight problems may begin when the shop does not have what he wants. Then the salesman tries to sell the customer (顾客) something else he offers the nearest he can to the thing required. He usually says, "I know this jacket is not the style (式样) you want, sir, but would you like to try it on for size It happens to be the color you wanted." Few men have patience with this treatment, and the usual reply is: "This is the right colour and may be the right size, but I should be wasting my time and yours by trying it on."

Now how does a woman go about buying clothes She does so in the opposite way. She has never fully made up her mind what she wants, and she is only "having a look round". She is always open to persuasion, indeed she considers of great importance what the saleswoman tells her, even what her friends tell her. She will try on any number of things. Highest in her mind is the thought of finding something that everyone thinks suits her. Most women have an excellent sense (判断力) of value when they buy clothes. They are always trying to find an unexpected bargain. Faced with a roomful of dresses, a woman may easily spend an hour going from one counter (柜台) to another before selecting the dresses she wants to try on. It takes a great deal of time but gives great joy. Most dress shops supply chairs for the waiting husbands.

When a man is buying clothes, he ().

A. puts price before quality

B. chooses things that others think suitable for him

C. does not mind much the price he has to pay for the fight things

D. buys good quality things, so long as they do not cost too much

题型:单项选择题

发电机中性点采用何种接地方式?有何作用?

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