计算：16+(-12)×12-|-1|+(π-1)0．

阅读下面的短文，然后按照要求写一篇150词左右的英语短文。

Nowadays we live in a global village, and many difficulties will arise if we can’t express ourselves fluently in English.

In spite of my awareness of its importance,I seldom find chances to practice and improve my oral English.So,I am still very weak with regard to this respect.One reason is that my pronunciation and intonation aren’t good enough.The other is that I am so shy that I am always too nervous to find other exact words to express my ideas and feelings.As a result the best way for me to do is to remain silent when others are practicing and making great progress in their oral English every day.

Now I am attaching much more importance to oral English and I have made up my mind to seize every opportunity to parctice. I begin to participate activities,such as going to “English Corners”,talking in English with my classmates and with native speakers. “Nothing is difficult in the world if you really put your heart to it.”as the Chinese saying goes.If I can build up my confidence,if I am not afraid of losing face any more,if I really work hard on it,I am sure my oral English will be excellent someday

【写作内容】

1.以约30个词概括短文的要点；

2.然后一120个词写一篇英语短文谈谈广东高考英语口试对你口语练习造成的影响，并包括如下要点：

（1）你以前对英语口语的态度及原因；

（2）广东高考英语口试对你目前英语口语练习造成的某些影响；

（3）你的感想或期望。

【写作要求】

1.作文中可使用自己的亲身经历或虚构的故事，也可以参照阅读材料的内容，但不得直接引用原文中的句子；标题自定。

2.作文中不能出现真实姓名和学校名称。

[评分标准]    概括准确，语言规范，内容合适，语篇连贯。

渐变多焦点镜片用于矫正什么屈光状态最好（）

A.散光

B.近视

C.远视

D.老视

E.正视

根据协定价格与标的物市场价格的关系，可将期权分为( )。

A．实值期权

B．虚值期权

C．平价期权

D．看涨期权

下列调节系统不属于按照动态分类的是（）

A.线性调节系统

B.连续调节系统

C.断续调节系统

D.随动调节系统