【简答题】设 f 是格 到 的同态映射,证明对任何 a,b ∈ A 1 ,如果 a ≤ 1 b , 则 f ( a ) ≤ 2 f ( b )。
【简答题】行人、非机动车、拖拉机、轮式专用机械车、铰接式客车、全挂拖斗车以及其他设计最高时速低于( )公里的机动车,不得进入高速公路。
【简答题】行人、非机动车、拖拉机、轮式专用机械车、铰接式客车、全挂拖斗车以及其他设计最高时速低于( )的机动车,不得进入高速公路。
【简答题】Jack didn't plan his time well he didn't finish his homework in time
【简答题】Friends Reunited is a website where you find and make friends. It brings together —that is, reunites—old friends, or people who used to be friends, but have not seen each other for a long time. On its...
【简答题】行人、非机动车、拖拉机、轮式专用机械车、铰接式客车、全挂拖斗车以及其他设计最高时速低于( )公里的机动车,不得进入高速公路。
【判断题】面试之前已经发过简历了,面试当天就不用带简历了。
【单选题】After eight hours of losing contact, she finally got in touch ________ her teammates.
【单选题】We have been engaged ___ for many years.
【单选题】行人、非机动车、拖拉机、轮式专用机械车、铰接式客车、全挂拖斗车以及其他设计最高时速低于( )的机动车,不得进入高速公路。