下列哪条对全冠龈边缘位置设计无影响（） A.固位力大小 B.美观因素 C.牙龈的保护

如果长方形ABCD的对角线的交点与平面直角坐标系的原点重合，且点A和点B的坐标分别为（-3，2）和（3，2），则该长方形的面积为            [ ]

A.32  

B.24  

C.6  

D.8

Part 3

Questions 19-25

·Read the following article and answer questions 19-25.
·For questions 19-25, choose the correct answer A, B, C or D.

The Haunted America

Countries are like little homes; they house a nation, hold ideologies and provide shelter and comfort to its people in hopes that the occupants will nurture better ideas for themselves and further flourish humanity. Such are primary desires and goals of most countries on this small planet.
America is no exception. For decades, billions of people around the world slept at night on empty stomachs amidst dreadful circumstances, often dreaming of the freedoms and liberties of America, which they likened to a great land, a paradise and a final destination point.
The best and brightest of the world gravitated to the great USA in search of golden opportunities; in hordes they came, and en masse they settled. America became the nation which acknowledged greatness and provided the driving force to allow the dreams of small, ordinary people to take form and flourish. Free from restrictions, allowing grand expressions with extraordinary liberties, that no other nation in the history of mankind has been able to match at such a grand scale.
But currently, it seems that this home of the American nation has started to resemble that old mansion, elegantly pristine (质朴的) but known to be haunted, sitting at the end of that dead-end street where ghosts, mysterious apparitions (幽灵) and unexplainable signs have emerged. This planet, like an old street, is already full of such haunted houses, which at times seem abandoned, lifeless and unable to give or receive neighborly warmth; factors so critical for any country on the global scene.
Can this badly damaged image of America be fixed today and by whom and at what cost What must it include—a new costume, a new mask or a new heart These are very important underlying questions, but the biggest question remains—can an entire country be branded to the rest of the world in the same fashion as a breakfast cereal or laundry detergent
The answer is a flat no. Only the branding-circus would come up with such a fake, superficial, logo-centric-slogan-happy attempt to rebuild a nation painted with banners and billboards. In reality, countries cannot be branded in such a simple process from the past; firstly, nations are already branded over decades and centuries by their histories and cultural interactions and exportable identities.
A global image is not in the hands of a polling company or controlled by a branding agency. Rather, they take form in the minds of the global masses, who paint their own mental picture based on their own interpretation of a nation. Therefore, it demands an awesome force, as the global public will not be swayed by ad-campaigns, rather by the exuberance (茂盛) of sincere and honest truth and internal fixing leading to an inviting charm. After all, this is how the image of America was built in the first place.
As a rule, if it has cost trillions to get where America is on global public opinion today, then it is easily understandable why it would cost a similar amount to fix the damages. Nations can only hope to improve their domestic issues first, before reflecting out to the world and preaching to the rest of the neighborhood.
In commercial terms, American brands have lost their luster at an alarming rate during the last five years, and are now in serious danger of being over-powered by brand new identities arising from all over the newly repositioned world. This super-accelerated nouveau-consumerism has all the making of this global shift increasingly permanent on brand image leadership, a position that the USA once proudly held. The future is clearly drawn out for new countries currently engaged in trying out this global-image-creation-wizardry with full tbrce while the early signs indicate a major world-wide mega branding and global-image-repositioning shift.
How can this great nation housed in America immediately nurture harmony within, balance the out-of-touch extreme ideologies among republicans and democrats, and educate its youth that is currently the lowest among G-8 and slipping into the level of developing countries It must have a nation that deeply engages in voting and really takes care of its own people. Most importantly, it needs real guts and must once again re-learn to face the truth and move forward in the good, old-fashioned American style.

America used to be thought of as ______.

A．a paradise and a final destination point

B．a land of freedoms and liberties

C．a land of golden opportunities

D．all of the above

选择粗基准时，应该保证零件上加工表面和（）之间具有一定的位置精度。

A、加工表面

B、不加工表面

2010年上海市工业总产值增幅稳步提高，2月份，全市工业总产值(规模以上口径，下同)完成1821.02亿元，同比增长17.5%，剔除春节假期因素后，环比增长1.1%。其中，轻工业完成产值359.93亿元，同比增长2.8Z；重工业完成产值1461.09亿元，同比增长21.9%。实现规模以上工业增加值同比增长15.7%。1～2月，全市完成工业总产值4069.86亿元，比去年同期增长32.4%；实现工业增加值增长28.9%。
六个重点发展的工业行业增幅高于全市工业总体水平。2010年1～2月，上海市六个重点发展的工业行业完成工业总产值2616.88亿元，比去年同期增长42%，增幅高出全市工业9.6个百分点。

2010年1～2月工业生产情况
	2月(亿元)	比去年同月 增长(%)	1～2月 (亿元)	比去年同期 增长(%)
规模以上工业总产值	1821.02	17.5	4069.86	32.4
六个重点发展行业工业总产值	1201.64	26.1	2616.88	42.0
电子信息产品制造业	430.19	42.4	922.48	60.1
汽车制造业	209.18	46.2	483.17	77.9
石油化工及精细化工制造业	222.52	14.6	473.98	25.7
精品钢材制造业	119.41	38.0	251.33	41.0
成套设备制造业	186.66	-7.4	407.83	5.5
生物医药制造业	33.68	4.6	78.09	17.6

表中各行业按生产值大小排序，2010年2月相较于1月排序发生变化的有几个______

A．6
B．2
C．4
D．0

（）及以上旅客列车通过时，作业人员须提前停止在相邻线路通过列车一侧的作业。

A.直达

B.特快

C.快速

D.直通