用显微镜观察时，如果转动目镜和物镜都未能把视野中的污点移走，那么可以断定污点在[

《独立宣言》被马克思称为“第一个《 * * 宣言》”，主要是因为它

A．号召反抗英国殖民压迫

B．宣告了美利坚合众国的诞生

C．直接影响了法国大革命

D．是最早体现天赋 * * 思想的政治纲领

下列句中划线词意义相同的一项是  

A．①料大王士卒足以当项王乎②竖子不足与谋

B．①于是荆轲遂就车而去②荆轲自知事不就

C．①因人之力而敝之②因击沛公于坐

D．①杀人如不能举②愿举国为内臣

在用高级沥青铺设的高速公路上，汽车的设计时速是108km/h．汽车在这种水平路面上行驶时，它的轮胎与地面的最大静摩擦力等于车重的0.6倍，试求：

（1）如果汽车在这种高速路的水平路面弯道上转弯，其弯道的最小半径是多少？

（2）如果弯道的路面设计为倾斜，弯道半径为360m，要使汽车通过此弯道时不产生侧向摩擦力，则弯道路面的倾斜角度是多少？（用三角函数表示）

房地产开发项目工程招标文件不包括( )。

A．评标委员会组成人员

B．工程量清单

C．合同专用条款

D．合同通用条款

在墨西哥度假

Each year more travelers are finding their way to the sun coasts of Mexico; where ancient civilizations once honored the sun, modern sun worshippers are discovering superb vacation destinations. Airlines now schedule weekly flights from major national and international points to a variety of sun coast resort areas.

The peninsula of Baja California provides one of the most splendid vacation sites in the Western Hemisphere. The peninsula is divided into two states: Baja California Norte and Baja California Sur, which are now connected by the Benito Ju rez Trans-peninsular Highway, so that the entire peninsula can be easily reached by car, as well as by sea and air. A chain of new hotels offer deluxe accommodations, but there are also numerous camping grounds, trailer parks and wayside inns for those who prefer casual-living vacations. At the southern end of the peninsula, La Pazi San Jos del Cabo and Cabo San Lucas offer rapidly expanding deluxe facilities to accommodate the growing influx of visitors. All have good accommodations, restaurants, sports facilities and meeting rooms. In addition, La Paz, with its duty-free zone, is a shopper’s paradise.

Kino Bay, a coastal resort on the mainland near Hermosillo, is expanding and will soon offer new luxurious tourist accommodations.

South along the coast are Topolobampo and Los Mochis, the former a ferry terminus serving La Paz on the peninsula, and boasting the largest natural bay in the world; and the latter a starting point for the Chihuahua-Pacific Railway trip which goes through the breath-taking Copper Canyon to the city of Chihuahua．

Mazatlan, the sailfish capital of the world, has developed a large new resort complex to accommodate its many visitors. Famous for its jumbo shrimp and other delicious seafood, Mazatlan also offers seasonal bullfights, lively evening entertainment and big-game fishing. An international fishing tournament is held there each fall. Modem convention and sports facilities are available. Mazatlan is easily reached from other major cities by good high-ways and an international aiport.

Puerto Vallarta, once a sleepy fishing village, is now one of Mexico’s fastest growing resorts. The red-tiled roofs and cobblestoned streets contrast with the luxurious new hotels. The annual temperature averages around 80°F., offering a perfect climate for parasailing, skin diving, surfing and other aquatic sports. Evening entertainment includes seafood dinners, floor shows and disco dancing that lasts until daybreak. Big-game hunting and fishing are also popular within this region of coastal Mexico.

The world’s largest natural bay is located in（）

A．Topolobampo and Los Mochis

B．Los Mochis

C．Mazatlan

D．Topolobampo