阅读理解。
Nowsatellitesarehelpingustoforecasttheweather.Theyareinspaceandtheycanreachanypartoftheworld.Thesatellitestakepicturesofatmosphere(大气).Sothescientiststherecanseetheweatherofanypartoftheworldandhowtheweatherwillchange.
Todaynearlyfivehundredweatherstationsinsixtycountriescanreceivesatellitepictures.Whentheyreceivethenewpicturestheycompare(比较)themwiththeearlierones.Perhapstheymayfindthatthecloudshavechangedduringthelastfewhours.Thismaymeanthattheweatheronthegroundmaysoonchangetoo.Intheirnextweatherforecasttheycantellpeopleaboutit.
Sotheweathersatellitesareofgreathelptothescientistsatthestation.Inthepasttheycouldforecasttheweatherforabout24or48hoursearlier.Nowtheycanmakegoodforecastfor3or5days.Soonperhapstheymaybeabletoforecasttheweatherforaweekormoreahead.
根据短文内容判断正(T)误(F)。
( )1.Theweathersatellitesinspacecanhelpthescientiststoknoweverything.
( )2.Changingcloudsintheatmospheremeansthatweathermaychange.
( )3.Withoutsatellitesscientistscouldforecasttheweatherfor3or5daysahead.
( )4.Todayeverycountryhasitsownweatherstationwhichcanreceivesatellitepictures.
( )5.Themainideaofthispassageisthatsatellitesarenowusedinweatherforecast.
