题目内容：
Directions：In this section，you will hear a passage three times．When the passage is read for the first time,you should listen carefully for its general idea．When the passage is read for the second time。you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard．For blanks numbered from 44 to 46 you are required to fill in the missing information．For these blanks,you can either use the exact words you have just heard or write down the main points in your own words．Finally,when the passage is read for the third time，you should check what you have written． 注意：此部分试题在答题卡2上；请在答题卡2上作答。
The National Weather Service is revamping the way it has issued severe weather warnings for decades with a new system designed to mark a geographic bull's eye where a storm will hit．
The system，which goes into effect on Oct．1，(36)_________from alerts based on county lines to notices aimed at(37)_____________communities，weather service officials said Tuesday．Using radar and computer(38)______________programs，the system is meant to predict the moment a storm will hit a community or even a(39)___________________crossroads．
Known as storm-based warnings，the new alerts could(40)___________a warning area from thousands of square miles to a few hundred square miles，experts said．
“A storm-based warning(41)______________on a storm it self and the geographic area that might be affected by it，”said Eli Jacks，a meteorologist at NWS(42)______________in suburban Washington．
The new system will(43)______________be limited to warnings for tomadoes，severe thunderstorms，floods and marine hazards．Later，it will be expanded to include other threats like extreme heat，Jacks said．
Tornado forecasting began in the late 1940s，and(44)______________________.
Warnings generally have been issued on a county-by-county basis ever since．
Under the new system,(45)_______________________.On a radar map．the warned areas appear as highlighted polygons rather than entire counties；forecasters will refer tocommonly known landmarks like rivers and roads in written announcements．
(46)______________________________________________________________.
根据所听短文，回答题
请作答_____
参考答案：
答案解析：