--I heard the high-speed train between Beijing and 
what is the difference between particle speed and wave speed
I felt ____ when I heard the ____ news. [ &
问句:( ) the distance between Hefei and Beijing
Between Virginia and Maryland on the Potomac River lie  
The Transrapid Maglev is the world's first high-speed train
阅读理解.H 阅读理解. High in the mountains,and de
I heard him ________ every night. [
how can we get there?( )take the high-speed train?why don't
I felt very ____ when I heard the ____ news. [ &n
China’s train sets world speed record A new high-speed train
the train goes___shanghai ___hangzhou.A between,and B betwee
what are the differences between university and high school