【单选题】Students often ______ a lot of difficulties when they communicate with foreigners for the first time.
【简答题】When you are far away from home for the first time and have a lot to adjust to,you can't do it alone. However independent you are,it is good to have a roommate during your first year. Living with some...
【单选题】At first, his family thought the band’s busy touring schedule was to blame. But when Nick — 13 at the time — finally sought medical attention, doctors discovered that the problem was a lot more s...
A.
当尼克(当时是13岁)最终寻求医生治疗时,医生们却发现问题要严重得多。而开始时,家人以为乐队巡回演出的繁忙日程是造成这一后果的原因。
B.
开始时,家人以为乐队巡回演出的繁忙日程是造成这一后果的原因。但当尼克(当时是13岁)最终寻求医生治疗时,医生们却发现问题要严重得多。
【简答题】活塞顶部的形状与混合气形成方式,燃烧室设计和发动机压缩比大小有关,下面4个选项中的活塞实物图,哪些是典型的汽油机活塞?A. B. C. D.