2014年9月18日,CRH380A型电力动车组试跑贵广高铁,时速380公里,是世界上商业运营速度最快、科技含量最高、系统匹配最优的动车。我国最快动车组生产成功的关键条件是( )
If you have any problem, you can _________me for help. Which is wrong?
The Smiths _______ China for ten years , so they have been used to the life here. A. have been to B. have gone to C. have been in
Our special is ________ soup.
--- Where is your mother? --- She _______ to Sichuan on business. She has ______ there four times recently.
There ________ any computers on our desks.