题目

听材料，回答问题。 （1） Why are the people asked to leave the building? A . Because a shopping bag has been found giving off harmful gas. B . Because something explosive has been discovered. C . Because a fire caused by cigarettes has broken out. （2） What are the people asked to do while leaving? A . To listen to the attendants. B . To hold the elderly and disabled people firmly. C . To go anywhere as quickly as possible. （3） What should one do if he is smoking? A . Throw the cigarette away. B . Give the cigarette to an attendant. C . Put 读“北半球中高纬度示意图”，完成下列各题。 1..有关甲、乙的位置，正确的是（    ） A.甲位于30°N                         B.乙位于30°N C.甲位于90°N                         D.无法确定 2.有关①②气流的叙述，正确的是（    ） A.①是冷性气流                        B.②是暖性气流 C.①是西风带                          D.②是西南风