协方差

The Best of Alaska

Nothing evokes(唤起) Alaska like a whale exploding out of the water or an eagle pulling a silver fish from the river.Combine these images with high mountains，brilliant icebergs and wonderful meals and you really do have the Best of Alaska!

Join us for an unforgettable 7­day excursion(远足) to the last frontier！Additional highlights include：a scenic flight over Glacier Bay National Park，a rafting trip through the heart of the Chilkat Bald Eagle Preserve，historic Skagway，a whale watching cruise and the company of knowledgeable local guides.

HIGHLIGHTS：

JUNEAU：Juneau，the state capital，is rich in culture and scenic beauty.It is here that we start and end our trip.

HAINES：Haines is a small community located along the fiords(峡湾)．The natural beauty and expansive wilderness found here have made Haines a premier center for adventure in Alaska.In 2004，Haines was listed by Outside Magazine and National Geographic Adventure as one of the best places for recreation and living.The activities listed below are located in Haines.

ALASKA INDIAN ARTS：Alaska Indian Arts is a nonprofit corporation dedicated to the preservation and continuation of traditional native craft and culture of the Northwest Native Tribes.Alaska Indian Arts is also the headquarters for several of Alaska’s outstanding craftsmen and artisans.We spend a few hours learning carving，native beading(串珠饰) and culture from these master artists.

SKAGWAY：Skagway is famous for its role in the Klondike Gold Stampede over 100 years ago.Today，it is a historic yet lively town，which still reflects its gold rush roots and contains colourful shops.In Skagway，we stop by the Klondike Gold Rush National Park Visitor’s Center and ride the White Pass Yukon Route Railway.

GUSTAVUS：Gustavus is the gateway to the Glacier Bay National Park.We’ll stay at a comfortable lodge here for two nights.This will be the base for both the whale­watching excursion and a full day cruise in Glacier Bay.

DATES/PRICES：

May 16，June 20，July 18，August 15.

7 days—$3,500，including lodging，all meals，excursions，guides，park fees，sales taxes，and transportation between Juneau，Skagway，Haines，and Gustavus.Not included：alcohol，personal items，airfare to and from Juneau.

CONTACTS：

E­mail：info@alaskamountainguides.com

Call：(800)766­3396

Write：Alaska Mountain Guides & Climbing School

P．O.Box 1081，Haines AK 99827

小题1:You can feel the history of the local place at ______.

A．Juneau

B．Skagway

C．Haines

D．Gustavus小题2:You can watch a whale exploding out of the water at ________.

A．the Glacier Bay National Park

B．the Klondike Gold Rush National Park

C．the White Pass Yukon

D．the Northwest Native Tribes小题3:According to the advertisement，the participants of the excursion ________.

A．will spend one day experiencing the local culture at Alaska Indian Arts

B．can contact Alaska Mountain Guides & Climbing School by e­mail or fax

C．are able to experience some adventurous activities in Haines

D．can get lots of traditional native artworks free of charge小题4:Which of the following requires participants to pay additional fees?

A．Going from Gustavus to Juneau by train.

B．A full day cruise in Glacier Bay.

C．Having the last supper at Juneau.

D．Flying from Juneau to their hometowns.

读“中国四大地理区域”示意图，完成下列各题。（10分）

（1）在四大地理区域中，界线A是      地区与      地区的分界线。

（2）在四大地理区域中，界线B是      地区与      地区的分界线，它大致与我国1月      ℃等温线的分布最接近；大致与      毫米等降水量线最接近。

（3）界线B是我国一条重要的自然地理分界线，它与      山脉、      河的分布大体相一致。

（4）界线C与我国地势阶梯的                          界线基本吻合。

成纤维细胞分泌的哪些物质组成毛细血管基底膜的网板()

A．层粘连蛋白

B．纤维连接蛋白

C．Ⅲ型胶原

D．Ⅳ型胶原

E．基质

供应延髓外侧部血液的血管是（）

A.大脑中动脉

B.大脑后动脉

C.大脑前动脉

D.椎动脉

E.基底动脉

下面对用友*.ba_备份文件处理，叙述正确是（）。

A.把.ba_改成.bak

B.把.ba_改成.rar解压

C.把.ba_改成.rar解压，将解压出的来的文件添加一个.bak的后缀名

D.以上叙述都不对