近20年来，我国亚热带沿海地区某些耕地农业景观经历了“水稻田——甘蔗地——鱼塘—

男性，53岁，间断发作上腹部疼痛15年，近1个月来出现呕吐症状并逐渐加重，呕吐物为隔餐所进食物，量大，体重减轻8kg。

最急需安排的化验检查是

A．凝血功能

B．肿瘤标志物

C．血电解质水平和酸碱平衡状况

D．肝功能检查

E．肾功能检查

班主任建立良好班集体可以采取的基本手段和方法包括______。

A．善于向学生提出教育要求

B．确定班集体的发展目标

C．建立得力的班集体核心

D．培养正确的舆论和良好的班风

阅读下文，完成11一14题。

　　①紫禁城的城墙10米多高，有四座城门：南面午门，北面神武门，东西面东华门，西华门。宫城呈长方形，占地72万平方米，有大小宫殿70多座，房屋9000多间。城墙外是50多米宽的护城河。城墙的四角上，各有一座玲珑奇巧的角楼。故宫建筑群规模宏大壮丽，建筑精美，布局统一，集中体现了我国古代建筑艺术的独特风格。

　　②从 * * 往里走，沿着一条笔直的大道穿过端门，就到午门的前面。午门俗称五凤楼，是紫禁城的正门。走进午门，是一个宽广的庭院，弯弯的金水河像一条玉带横贯东西，河上是五座精美的汉白玉石桥。桥的北面是太和门，一对威武的铜狮守卫在门的两侧。

　　③进了太和门，就到紫禁城的中心——三大殿：太和殿、中和殿、保和殿。三座大殿矗立在7米多高的汉白玉台基上，台基有三层，每层的边缘都用汉白玉栏杆围绕着，上面刻着龙风流云，四角和望柱下面伸出1000多个圆雕鳌头，嘴里都有一个小圆洞，是台基的排水管道。

　　④太和殿俗称金銮殿，高28米，面积2380多平方米，是故宫最大的殿堂。在湛蓝的天空下，那金黄色的琉璃瓦重檐屋顶，显得格外辉煌。殿檐斗拱、额枋、梁柱，装饰着青蓝点金和贴金彩画。正面是12根红色大圆柱、金琐窗、朱漆门，同台基相互衬映，色彩鲜明、雄伟壮丽。

　　⑤大殿正中是一个约2米高的朱漆方台，上面安放着金漆雕龙宝座，背后是雕龙屏。方台两旁有6根高大的蟠龙金柱，每根大柱上盘绕着矫健的金龙。仰望殿顶，中央藻井有一条巨大的雕金蟠龙。从龙口里垂下一颗银白色大圆珠，周围环绕着6颗小珠，龙头、宝珠正对着下面的宝座。梁枋间彩画绚丽，有双龙戏珠，单龙翔舞，有行龙、升龙、降龙，多态多姿，龙身周围还衬托着流云火焰。

　　⑥三大殿建筑在紫禁城的中轴线上，这条线也是北京城的中轴线，向南从午门到 * * 延伸到正阳门、永定门，往北从神武门到地安门鼓楼，全长约8千米。

1．选文采用的说明顺序是_______________；故宫博物院的总体特征是________________。

2．第④段中的画线句运用了__________的说明方法，它的作用是________________

3．文中④、⑤段分别介绍了太和殿的外部景观和_____________两个方面的情况。

4．第⑥段中的加粗词语“约”不能删除的理由是___________________________________。

在整个临床用药过程中药品的提供者和监督者是（）

A.医师

B.病人

C.药师

D.护士

Silicon Valley is a magnet to which numerous talented engineers, scientists and entrepreneurs from overseas flock in search of fame, fast money and to participate in a technological revolution whose impact on mankind will surely surpass the epoch-making European Renaissance and Industrial Revolution of the bygone age.
(46) With the rapid spread of the Internet since the early 1990s, and the relentless technological innovations generated through it, the information era is truly upon us, profoundly influencing and changing not only our lifestyle, but also the way we work, do business, think and communicate with others.
(47) The unprecedented success of the Valley is a testimony to the concerted international endeavors and contributions by people from diverse cultural and racial backgrounds, made possible by the favorable political, economic and intellectual climate prevailing, as well as the farsighted policies of the US government.
Many countries have, or are in the process of creating, their own "Silicon Valley". So far, none has as yet threatened the preeminence of the US prototype. What makes Silicon Valley such a Unique entity There are several crucial factors.
(48) First and foremost, it has the largest concentration of brilliant computer professionals and the best supporting services in the world, and easy access to world-class research institutions, like Stanford University, which continually nurtures would-be that the industry needs in order to move forward. Without these advantages, the Valley would be a different place.
Secondly, it actively encourages, or even exalts, risk taking. Hence, failure holds no terror and there is no shame attached to a failed effort. On the contrary, they will try even harder next time round. Such never-say-die approach is the sine qua non for the ultimate triumph in entrepreneurship and technological breakthrough.
(49) A third decisive factor is the vital role of venture capitalists who willingly support promising start-ups with urgently needed initial capital to get them started. Some would even give failed entrepreneurs a second chance if convinced that a fresh concept might lead to ultimate success.
(50) Of equal importance, bright young people and middle level professionals are keen to work for a new venture at substantially reduced remuneration, as it offers more scope for entrepreneurship and job satisfaction than the established companies. There is also a pride of achievement if their efforts contribute to its fruition.
Intellectual challenges aside, it is a common practice for start-ups to offer generous share options to employees in order to attract the right talent into their folds. This is a powerful incentive to motivate the staff to do their utmost and to share in the company’s prosperity if it reaches its goal Many regard this as the foundation of a successful enterprise.