阅读理解。 There are many things we need to k

题型:阅读理解

问题:

阅读理解。
     There are many things we need to know that we don't learn at school. For example, if we want to use
our money wisely, we need to shop carefully. We need to know how to compare (比较) the prices of things
in different shops. We need to be able to compare the quality of different brands (商标). We need to know
how to make reasonable choices when we shop.
      Knowing how to make such choices is a life skill. And we need these skills if we are to lead useful and
happy lives. 
      Some of these choices are small. For example, will I take an apple for lunch or a pear? Will I get the bus
to school today or will I walk? Will I wear the red T-shirt or the blue one to the movies? Other choices are
more important. For example, will I eat healthy food for lunch or will I eat junk food because it's delicious?
Will I work hard in all my classes or will I only work hard in the classes I enjoy? We make decisions like
this every day. 
      Making the wrong choices can result in unhappiness. We have to realize that the choices we make can
affect the rest of our lives. Just as importantly, our choices can also affect other people. The next time you
decide to waste time in class, play a joke on someone or talk loudly at the movies, think this: Who else does
your choice affect?
1. What helps us use money wisely?
[ ]
A. Comparing prices and brands.
B. Buying things in different shops.
C. Choosing different brands.
D. Choosing.
2. We need "life skills" ______.
[ ]
A. to know how to shop sensibly (明智地)
B. to lead useful and happy lives
C. to compare brands and prices
D. to learn things at school
3. Which of these choices is the most important?
[ ]
A. Which fruit to take for lunch.
B. How to get to school.
C. Which T-shirt to wear to the movies.
D. Which classes to work hard in.
4. Why is it important to make the right choices?
[ ]
A. Because they can affect the rest of our lives and also affect other people.
B. Because they can make us waste time.
C. Because wrong choices can make us unhappy.
D. Because it is wrong to play a joke on someone or talk loudly at the movies.
5. Who does your choice affect?
[ ]
A. You and your parents.
B. Lots of other people.
C. You and other people.
D. Everybody except you.
考点:人生感悟类阅读
题型:阅读理解
先化简,再求值:①
1
4
(-4x+2x-8)-(
1
2
x-1)
,其中x=
1
2

②5x2-[3x-2(2x-3)+7x2],其中x=-2.
题型:阅读理解

(14分)已知粗铜中含有少量的锌、铁、银、金等金属和少量矿物杂质(杂质与酸不反应)。某化学兴趣小组在实验室条件下以硫酸铜溶液为电解液,用电解的方法实现了粗铜的提纯,并对阳极泥和电解液中金属进行回收和含量测定。

步骤一:电解精制:

电解时,粗铜应与电源的  ▲ _极相连,阴极上的电极反应式为  ▲ 

电解过程中,硫酸铜的浓度会  ▲ (选填:变大、不变、变小)。

步骤二:电解完成后,该小组同学按以下流程对电解液进行处理:

(1)阳极泥的综合利用:

稀硝酸处理阳极泥得到硝酸银稀溶液,请你写出该步反应的离子方程式:  ▲   。残渣含有极少量的黄金。为了回收金,他们查阅了有关资料(见下表):

序号反应化学平衡常数
1Au + 6HNO3(浓) Au(NO3)3 + 3NO2↑+ 3H2O<< 1
2Au3+ + 4Cl- =" " AuCl4->>1
 

从资料中可知,金很难与硝酸反应,但却可溶于王水(浓硝酸与盐酸按体积比1∶3的混合物),请你从化学平衡移动的角度简要解释金能够溶于王水的原因   ▲  

(2)滤液含量的测定:以下是该小组探究滤液的一个实验流程:

则100mL滤液中Cu2+的浓度为  ▲   mol·L-1,Fe2+的浓度为 ▲  mol·L-1

题型:阅读理解

林强做值日时,不慎把水洒在王涛的书本上。王涛一怒之下,对林强大打出手。此时,林强应该(  )

A.拼死还击,捍卫尊严

B.逆来顺受,忍气吞声

C.告诉老师,请求帮助,必要时寻求法律保护

D.纠集他人,伺机报复

题型:阅读理解

下列事例中,不是应用大气压的是

A.用吸管吸饮料

B.护士用注射器把药液注射进肌肉里

C.把吸盘式挂衣钩贴到墙上后,可以挂衣服

D.吸气时将新鲜空气吸入肺里

题型:阅读理解

按照我国现行分税制财政管理体制的规定,关税属于()。

A.中央税

B.中央与地方共管税

C.中央与地方共享税

D.地方税

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