High-speed trains travel at 300 kilometers an hour，which is about normal trains．
#14190
A
four times the speed as
B
the speed four times of
C
four times as the speed of
D
four times the speed of
推荐题目
At last they got the letter they____________．
#13977
A
haveexpected
B
wereexpecting
C
hadexpected
D
hadbeenexpecting
The European Central Bank yesterday the document was genuine but refused to make any further comment.
#10899
A
expected
B
suggested
C
confirmed
D
concluded
I took part in the ____ in the sports meeting last week.
#14471
A
800-meter-long
B
800-meters-long
C
800 meter long
D
800 meters long
After the earthquake, many people had to be _____ in the tents because most of their houses were badly damaged.
#12189
A
put away
B
put out
C
put up
D
put off
He has a good command ________ maths and plays an important part ________ our team.
#12329
A
about; in
B
of; to
C
to; about
D
of; in