阅读狗狗发现GWD原题，特贴出分享（答案基本统一）

cherryfane

好贴阿 顶
大人们太厉害了！！！

camphane

楼主V5,CDerV5!

andyxu003

Q32:It can be inferred from the passage thatrefraction would be most likely to cause errors in measurements of a mountain’selevation under which of the followingconditions?
A.When there are local variations in sealevel
B.When light passes through humid air
C.When theodolites are used relatively farfrom the mountain peak.
D.When weather balloons indicate low airtemperature and pressure.
E.When sea level has been carried in to within five to twelve miles of the summit.

选C

D项，原文说放出balloons是为了measure changes，选项说只是显示了低温和低压，而不是气温和气压的变化

iamduzhe

第一题我同意C

因为文中说了他们缩短了光射到经纬仪的距离来减小误差，说明距离大误差大
C.When theodolites are used relatively farfrom the mountain peak.

而D只说了低压低温，按原文意思，只有温度和压力的变化会有折射误差，如果所有的地方都是同样的低压低温的话，不会有误差
D.When weather balloons indicate low airtemperature and pressure.



有道理！

非常感谢LZ!

-- by 会员 游吟者 (2010/8/26 2:00:22)

trandee

顶顶顶~~

13873194104

同意选C ，希望明天能遇到！