在数据流图的类型中有两种类型，它们是变换型和______。

妊娠期营养不良对母体的影响有（），（），（）。

下表为“珠江、淮河流域有关数据对比表”。读表并回答问题。(12分)

※为2005年数据

(1)淮河流域面积约为珠江流域的3/5，而径流总量却不足珠江的1/5，其主要原因是     。(2分)

(2)淮河流域水资源利用率远高于珠江流域的主要原因是                             。(2分)

(3)珠江中下游地区夏秋季节多突发性暴雨洪水，主要原因是             ；冬季河口处常受海水人侵的威胁，主要原因是                             。(4分)

(4)淮河流域7、8月份多洪水，主要气候原因是                             。(2分)

(5)珠江、淮河流域的耕地面积分别约为480万公顷和l200万公顷。若两流域单位面积耕地的农业污染量相当，根据耕地面积和径流总最的对比关系，淮河受农业污染的程度约为珠江的       倍(取整数)。(2分)

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

后前位胸片摄片时的要求，下列哪项是错误的（）

A.常规胸部后前位，应是深吸气后屏息曝光

B.双肩胛骨应投影于肺野之外

C.照射野越大越好

D.去掉可使胶片产生伪影的物品

E.摄片距离在165～180cm

自动变速器主要由液力变矩器、液压控制系统、电控系统及（）组成。

A.变速器

B.减速器

C.行星齿轮装置

D.摆线齿轮装置