问题 问答题 简答题

简述跑道视程与气象能见度的区别。

答案

参考答案:(1)跑道视程是在跑道一侧用仪器测定的,其方向与跑道平行,高度在2.5—3.0米,视透射表装置的高度而定.。气象能见度主要在气象台目测,高度约1.6米,包括全部视野范围。

(2)跑道视程的目标物是跑道及其道面上的标志,其形状、大小和颜色是固定的。夜间灯是跑道中线灯或边灯,光强可调。气象能见度的目标物的形状、大小和颜色各异,夜间利用周围不同距离的已有灯光,其颜色、光强随意,且光强不可调。

(3)跑道视程限于气象能见度小于2000米以内才测定,气象能见度为观测者视力所及的所有能见距离。

单项选择题 A3/A4型题
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Alomada Racraotion and Fork Deportment (ARFD)

(510)747­7529

TEEN TRIP TO

THE LELAND HIGH SNOW PLAY

FOR Teens Currently in 6th to 12th Grades

LELAND HIGH SNOW PLAY­Class #8389

Friday,December 9 (Non­Public School Holiday)

8∶00 a.m.to 7∶00 p.m.

Cost per person:$50 ($60 after January 22)—Includes:Lunch,Admission and Transportation

With a 4,000 sq.ft.day use lodge,the Leland High Snow Play has a huge supply of tubes to choose from,along with awesome tows(拖车) that will tow you up to the top of the hill!Our varied terrains(地形) have something for everyone,while the lodge provides a snack bar,video games,pool tables,five indoor restrooms,a warm fire,and a sun deck with plenty of tables and chairs over looking the play area outside.

Additional liability(责任) form required for the trip.

Be sure to bring warm clothing and prepare for the cold,but dress in layers in case it warms up.Wear dry boots,socks,and sunscreen.If possible,bring a mobile phone in case of emergency,as well as money for snacks and a light dinner;or bring your own food and drinks.Meet at The Underground (Veteran’s Building­2203 Central Avenue)—don’t be late!

Do not bring electronic or fragile items during the trip.The ARFD is not responsible for your personal belongings or money.

Refunds are issued only if the ARFD cancels this trip due to weather conditions.

Click here to download the registration form and “Leland High Snow Play Liability Form”.

•Register in person,or mail the completed form to Leland High Snow Play,Inc.Send the liability form and payment to the ARFD Office,2226 Santa Clara Avenue,Alameda.

•Fax the registration and liability form accepted with VISA,(510)747­7566.

•Online registrations available at www.arpdeplay.com. Make sure you bring your completed liability form on the trip.

小题1:According to the text,the cost doesn’t include ________.

A.lunch

B.drinks

C.admission

D.transportation小题2:The purpose of the text is to ________.

A.introduce a famous tour agency

B.explain the details of a school activity

C.urge teenagers to climb a snowy mountain

D.advertise a trip to the Leland High Snow Play小题3:Teenagers who want to take part in the activity need to ________.

A.wear some warm clothes

B.climb the hill themselves

C.pay for tows individually

D.wear hats to protect themselves from the sun小题4:From the text it can be inferred that ________.

A.the activity is very dangerous

B.the weather there is changeable

C.the trip will involve outdoor activities only

D.12­year­old children are not allowed to take the trip