As former colonists of Great Britain, the Founding Fathers of the United States adopted much of the legal system of Great Britain. We have a “common law”, or law made by courts__1__a monarch or other central governmental__2__like a legislature. The jury, a__3__of ordinary citizens chosen to decide a case, is an__4__ part of our common-law system.

Use of juries to decide cases is a__5__feature of the American legal system. Few other countries in the world use juries as we do in the United States.__6__the centuries, many people have believed that juries in most cases reach a fairer and more just result__7__would be obtained using a judge__8__, as many countries do.__9__a jury decides cases after “__10__”, or discussions among a group of people, the jury’s decision is likely to have the__11__ from many different people from different backgrounds, who must as a group decide what is right.

Juries are used in both civil cases, which decide__12__ among__13__ citizens, and criminal cases, which decide cases brought by the government __14__ that individuals have committed crimes. Juries are selected from the U.S. citizens and__15__. Jurors, consisting of __16__ numbers, are called for each case requiring a jury.

The judge__17__to the case__18__the selection of jurors to serve as the jury for that case. In some states,__19__jurors are questioned by the judge; in others, they are questioned by the lawyers representing the__20__under rules dictated by state law.

1. [A] other than   [B] rather than     [C] more than      [D] or rather

2、化学性质:

 I:稀硫酸(微粒:      ),具有酸的通性。

 II:浓硫酸(微粒:大部分是   分子),具有特殊性质

⑴吸水性:

常见的干燥剂:酸性的有_________;中性的有:_____;碱性的有______

[图]常见的干燥装置:

⑵脱水性:

[思考]①浓硫酸不小心沾到皮肤上如何处理?浓硫酸怎样稀释?

②浓硫酸滴在纸、棉花和木条上有何现象?

⑶强氧化性:(冷的浓硫酸遇Fe和Al要    )

①    氧化绝大部分金属(与CU、Fe等)

[实验]书P92:铜与浓硫酸反应装置

②    氧化非金属单质(C)

[例5]

(1)上述装置中,在反应前用手掌紧贴烧瓶外壁检查装置的气密性,如观察不到明显的现象,还可以用什么简单的方法证明该装置不漏气。                        

(2)如果用图中的装置检验上述反应的全部产物,写出下面标号所表示的仪器中应加入的试剂的名称及其作用:

A中加入的试剂是           ,作用是           

B中加入的试剂是           ,作用是          

C中加入的试剂是           ,作用是除尽       气体。

D中加入的试剂是           ,作用是          

(4)实验时,C中应观察到的现象是                  

[思考]①蔗糖晶体中加入浓硫酸至过量产生的现象?这过程中浓硫酸体现了哪些性质?

②浓硫酸的氧化性与稀硫酸的氧化性的比较?浓、稀硫酸如何鉴别?

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