用下列实验装置进行相应实验,能达到实验目的的是 图1图2图3图4 A.用图1所

题型:选择题

问题:

用下列实验装置进行相应实验,能达到实验目的的是

图1              图2               图3                 图4

A.用图1所示装置,蒸干AlCl3饱和溶液制备AlCl3晶体

B.用图2所示装置,制备并收集少量NO2气体

C.用图3所示装置,分离CCl4萃取I2水后的有机层和水层

D.用图4所示装置,可以证明氧化性:Cl2>Br2>I2

考点:物质的分离离子的检验粗盐的提纯
题型:选择题

血液能运输CO的主要原因是()

A.HbO的解离

B.HbO解离后酸度降低

C.HCO能解离为H+HCO

D.Hb能结合CO而成氨基甲酸血红蛋白

E.红细胞内存在碳酸酐酶

题型:选择题

分析图示夹紧方案不合理的原因,并加以改进。

题型:选择题

Balzac was good at buying things at its lowest price. One day he wanted to buy a vase in a shop window that was much more expensive than he could offer. Not being able to make the shopkeeper cut down its price very much, he left without further talking. Collecting a half dozen of his friends, he explained his wish to them and they worked a plan. The first would enter the shop and make an offer, lower than the marked price. Not getting the vase at his price, he would walk out. Shortly after another would enter and ask for a price lower than the first. In this way, each of the others would offer a price lower than the one before, and the last of his friends made a great effort to attempt to get it at the lowest price. Before long Balzac himself would return, offer more than the last two or three persons made and trust to luck. The plan worked--- Balzac got the vase at his price!

小题1:Which of the following is true according to the passage?

A.vase in the window was placed much higher than Balzac could reach.

B.At first the price of the vase was much higher than Balzac could offer.

C.Balzac always wanted to buy a vase that was much more expensive than he could pay.

D.Balzac was very poor. He couldn’t buy the vase at a high price.小题2:How many friends did Balzac gather?

A.Six

B.Twelve

C.Ten

D.Five小题3:Who asked for the lowest price?

A.The first one.

B.The second one.

C.The last of his friends.

D.Balzac.小题4:What kind of person does the writer try to tell us about Balzac and his friends?

A.Unkind

B.Dishonest

C.Selfish

D.Clever

题型:选择题

现代大容量电站锅炉常采用()省煤器。

A、铸铁式;

B、钢管式;

C、膜式;

D、热管式。

题型:选择题

阅读下列材料,回答问题:

材料一 未经议会同意,国王无权废除法律或停止法律的执行;不经议会同意,国王不能征税:不经议会同意,国王不能在和平时期维持常备军;议会必须定期召开;议员的选举不受国王的干涉。

材料二 人们生来是自由的,在权利上是平等的;自由、平等、安全、反抗压迫是天赋的权利;在法律面前人人平等;私有财产是神圣不可侵犯的。

材料三 “我们以这些殖民地的善良人民的名义和权力,谨庄严宣告:这些联合殖民地从此成为而且名正言惯应当成为自由独立的合众国。它们解除对于英王的一切隶属关系。而且它们与大不列颠王国之间的一切政治联系也应从此完全废止。”

材料四 宪法规定:这个国家是一个联邦国家,实行总统制,总统既是国家元首,又是政府首脑。

材料五 这部法令是法国的,第一编是人法,第二编是物法,第三编是关于取得所有权的各种方法。这部法令是资产阶级的第一部民法典,它对后来很多资本主义国家的立法产生了很大影响。很多国家在制定本国的民法典时是以这部法典为蓝本或是作参考。

(1)材料一这个法令使该国确立了什么政治体制?实行这一体制的国家在今天的世界上仍有很多,请你再举出一个例子。

(2)材料二文献出自哪国法令?为什么说它在当时具有进步意义?

(3)材料三中“这些殖民地”指什么?

(4)材料四“宪法”是指什么?材料五“法令”是准统治法国时期制定的?

(5)结合所学知识,谈谈以上五则法令在性质上有何共同之处?

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