What does the passage mainly discuss? [br] What regular service did The Associ

游客2024-01-05  19

问题  What does the passage mainly discuss? [br]  What regular service did The Associated Press and United Press International begin to offer subscribing newspapers in the 1930’s?

选项 A、A new system of weather forecasting
B、An air-mass analysis
C、Twice daily weather maps
D、Cloud-cover photographs

答案 B

解析
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