题干
People often lose things____ they're travelling____ ____ they're in a hurry．
人们在旅行中或是匆匆忙忙时经常丢东西。
答案(点此获取答案解析）
when,or,when
People often lose things____ they're travelling____ ____ they're in a hurry．
人们在旅行中或是匆匆忙忙时经常丢东西。
，若
在(O,
)上单调递减,则实数a的取值范围为