宫颈糜烂的分度依据（）。 A.糜烂深度 B.糜烂形状 C.糜烂面积 D.糜烂位置 E

（共6分）实验室制取SO₂的反应原理之一为：Na₂SO₃＋H₂SO₄（浓）===Na₂SO₄＋SO₂↑＋H₂O。请用下列装置设计一个实验，以测定SO₂转化为SO₃的转化率：（×100℅）

（1）这些装置的连接顺序（按气体左右的方向）是  →   →  →   →     →     →     →     →     （填各接口的编号）。

（2）实验时甲橡胶管的作用与原理是                               。

（3）从乙处均匀通入O₂，为使SO₂有较高的转化率，实验时Ⅰ处滴入浓硫酸与Ⅱ处加热催化剂的先后顺序是                                    。

（4）Ⅳ处观察到的现象是                                        。

（5）用n mol Na₂SO₃粉末与足量浓硫酸进行此实验，当反应结束时，继续通入O₂一段时间后，称得Ⅲ处增重m g，则本实验中SO₂的转化率为              。

阅读理解

                                                       The Loss of Innocence(纯真)

     Innocence is such a precious gift. It's explained as freedom from guilt or wrong doing. Just imagine

never having to worry about anything and having a guilt-free mind. Some people wish to save this kind

of innocence from being lost from childhood to adulthood.

     What would the world be like if innocence were never lost? One way it would benefit humanity is the

lack of hatred (仇恨) among the world. During youth, there may be an occasional argument, even a little

physical fight, but nothing like firing a handgun at a fellow human being. And children are blind towards

the racial differences of others. A kid will hang out with any other kid. It is the lack of innocence and the

ignorance we learn from adults that influence children otherwise. Another benefit is the constant desire for

fun and adventure. With very little if any time at all for fun, the adventurous mind is lost in time with the

responsibilities placed upon adults. If innocence were kept alive, these ambitions would never depart from our lives.

     However, other people actually hate the idea of innocence lasting for ever. They feel that the lack of

organization and mental power of those with innocence would cause extremely destructive consequences

to society in general. A large number of individuals would never have the urge to learn, work, and act

upon the necessary needs for humanity to survive. Without a proper education which is usually provided

by those who no longer live in a world of innocence, people would not have the desire to succeed, get a

good job in life, or provide income for their families, which

would hurt the lives of children.

    The lack of a good education and career would also harm the economy. As long as innocence is kept

alive, no one would be terribly angry at the lack of effort people put out in the workplace, resulting in a

strong decline(减少) in production and quality of needed goods.

     Maybe it is wrong in wanting to save innocence. It sure is a nice thought, though. Perhaps innocence

was meant to be lost. It was god's will to make things the way they are, and there is a good purpose for

everything. All that remains to be said about innocence is to enjoy it while it lasts.

1. The author believes that the loss of innocence in adulthood should be______.

A. avoided  

B. criticized  

C. accepted  

D. encouraged

2. Lifelong innocence would be beneficial to society in that__________.

A. proper education would be provided

B. there would be no racial discrimination

C. there would be more happy families

D. people would realize their childhood dreams

3. According to the author, people with innocence can hurt the economy with their lack of____ .

A. motivational will

B. mental ability

C. adventurous ambitions

D. needed goods

4. Which of the following shows the structure of the passage?

CP:Central Point P:Point Sp:(次要点)C:Conclusion

链条炉生火前安全附件及各种仪表的检查？

立意须高，切口要小，这是论文写作的一条重要原则。只有把切口缩小，才能更深地开掘。但切口并不是越小越好。有些论文选题过窄，内容往往展不开，或者没有普遍意义，学术价值不高，导致专家不愿看、大众看不懂。

上述文字重在说明（）

A.立意须高，切口要小

B.选题不要过窄

C.选题要有普遍意义

D.选题过窄，学术价值不高