扬压力对坝体稳定（）。A.不利 B.有利 C.没关系

下面几种用电器的额定功率最接近1000W的是（  ）

A．电风扇

B．电脑

C．台灯

D．空调

造成内燃机轴瓦烧坏原因之一是使用的（）不符合标准。

第三部分：阅读理解（共两节，40分）

第一节：（共15小题；每小题2分，共30分）

阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

A

Experience the Colorado River the Hualapai Way! 

River Runners offers the ONLY One Day Whitewater trip ANYWHERE at the    GRAND CANYON!

Since 1973, Hualapai River Runners has been conducting whitewater rafting (漂流) journeys on the Colorado River. Our experienced guides expertly sail along the river and share the history of the Canyon and the Hualapai people with you.

Visitors experience the excitement of whitewater rapids and then stop to enjoy the impressive beauty of Travertine Falls and a tasty lunch. No charge for children 2 years and under.

One-Day Trip

Retail $249.00 + $79.00 (helicopter and round-trip ground transportation)

Whitewater rafting tours begin in Peach Springs. Hualapai River Runners transports you to Diamond Creek, which is the starting point for the 37 mile rafting tour. Lunch is included and upon arrival at the rafting tour termination point, fly out of the Grand Canyon by helicopter to Grand Canyon West.　

Two-Day Trip

Retail $549.00 + $79.00 (helicopter and round-trip ground transportation)

Two-day rafting trips with one night on the Colorado River. All supplies and meals are included. Two days in the Grand Canyon, on the Colorado River, allows more time to explore one of the Seven Wonders of the World.

Tours Include:

• Round-trip transportation from Peach Springs to the starting point and from the   termination point back to Peach Springs.

• Snack, drinks and lunch (vegetarian meals available upon request)

• Waterproof dry bags for storing your cameras, sunscreen, dry clothes, etc.

The helicopter part of transportation is weather permitting. If the helicopter transportation is cancelled because of bad weather, the raft will continue an additional two hours to South Cove and a maximum $20.00 per customer will be given back.

Special Website booking rate 15% off rafting in April 2010. So book now!

Call us Toll Free Today! Tel: 1-888-868-9378

56. Where do whitewater rafting tours start?

A. Travertine Falls.              B. Peach Springs. 

C. Diamond Creek.              D. Grand Canyon West.

57. We learn from the passage that ______.

A. Hualapai River Runners provides dry clothes

B. you will get $20 back if you are dissatisfied

C. the trip is free of charge for children under 2

D. online booking has a better offer all year round

58. What is the purpose of the passage?

A. To attract people to the sights.

B. To explore the Hualapai culture.

C. To explain how to make a rafting trip.

D. To introduce the history of the Colorado River.

-8，-4，4，20，( )

A．60

B．52

C．48

D．36

国与国之间的竞争归根结底是( )竞争。

A．社会制度

B．人才

C．科技发展

D．综合国力