问题 问答题 简答题

大气中的杂质具有哪些作用?

答案

参考答案:

(1)影响大气的水平能见度;

(2)能吸收太阳辐射和地面长波辐射,对气温和地温有一定的影响;

(3)是大气中水汽凝结的核心,对水汽凝结起重要作用。

单项选择题
阅读理解

Nickname (昵称): Hawaii’s Island of Adventure.

Size: 4,028 square miles.

Population: 148,677. The most heavily populated areas are Hilo on the east side and     Kailua-Kona on the west.

Temperature: Averages between 71℉ and 77 ℉ year around —expect the mercury ( 水银柱) to drop at higher Heights.

Beaches: 47  Golf Courts: 20   Highest Peak: Mauna Kea, 13,796 feet.

Agriculture: The bulk (主体) of Hawaii’s farming products are grown and processed on the Big

Island, including coffee, macadamia nuts and papaya.

Lodging: 9,655 rooms in total; nightly rates range from $ 35 to $ 5,000.

Airports: Hilo International Airport on the east side and Kona International Airport on the west

side.

Rental Cars: All of the nationally known rental car companies have locations at Hilo  International and Kona International Airports as well as many resorts. In addition, Hilo, Kona and the major resort areas are serviced by taxis.

Resources: Call (800) 648-2441 to order a video, a poster, brochures and maps from the Big Island Visitors Bureau. Turn to www. Bigisland. org for updated information.

Shopping: The largest shopping centers are in Hilo, Kona, Waimea and the Kona Coast.

小题1:_____ are mostly interested in reading the passage.

A.Tourists

B.Students

C.Businessmen

D.Officials小题2:The average population per square mile on the island is about _____.

A.28

B.37

C.32

D.44小题3:The underlined part “expect the mercury to drop at higher heights” means _____.

A.Things are easy to lose weight at higher places

B.Dropping things from higher places is expected

C.Temperature is expected to be lower at higher places

D.Temperature is expected to be higher at higher places