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.