在交流回路中，A、B、C三相母线的颜色标志分别为：（）A.黄、绿、红 B.绿、黄、红

从成语典故“醍醐灌顶”、“修身养性”、“三纲五常”中可以看出下列对中国传统文化发生影响的派别有  

①佛教   ②道教  ③墨家  ④儒家 [ ]

A ．②③④    

B ．①②③    

C ．①③④    

D ．①②④

果糖胺反映取血前血糖水平的时间是

A．瞬时
B．1～2周
C．2～3周
D．3～4周
E．4～12周

阅读理解。

    Child labor-the employment of children in industry, often against their will - has been a problem for many

years. Over a hundred years ago, Charles Dickens shocked many of his readers when he described the

conditions under which young children worked in British factories. The conditions Dickens described continue

almost unchanged today in many parts of the world. The only difference is that today employment of children

is confined (limited) to small industries and family businesses, such as hotels, restaurants and particularly farms,

rather than to large factories.

    Girls suffer more from child labor practices than boys. Many of them are forced to start work when they

are only ten years old. Although the work they are given to do is often light, it is often harmful to the health.

Recently, children as young as six years were found to be working in Asian factories, and the children were

working from eight to fourteen hours a day in overcrowded and unhealthy working conditions. Sometimes a

whole family group is employed, with the payment going to a parent or older relative. The children not only

receive nothing or very little for their long hours of work, but also they are prevented from attending school.

Therefore, when they become older they are unable to do any other kind of work.

    The solution to the problem of child labor is clearly better laws to protect young children, greater supervision

(监督) of industry and heavier fines for those who break the laws. Only in this way can young boys and girls

be allowed to enjoy the most valuable time of their lives-childhood.

1. Which's the main idea of the first paragraph? [ ]

A. Children are often willing to work in large factories.

B. Most children are working in British factories.

C. The poor working conditions of child labor in Dickens' novel.

D. The working conditions for children are similar to those a hundred years ago.

2. Girls' work is _____. [ ]

A. not harmful to the health though it is heavy

B. not harmful to the health because it is light

C. harmful to the health though it is light

D. harmful to the health because it is heavy

3. Young children go to work _____. [ ]

A. because they are forced to

B. in order to be skillful in a certain kind of work

C. in order to be paid well

D. in order to earn money for education

4. To solve the problem of child labor, the writer suggests the following BUT _____. [ ]

A. looking over factories more closely

B. raising their payment and improving the system of education

C. improving laws of protecting children's interests

D. punishing lawbreakers with severer fines

石油中的微量元素按其化学属性可划分成如下三类：一是变价金属；二是碱金属和碱土金属；三是卤素和其他元素。