The Meglev Train travels in a vacuum between two magnets, ___ no pollution is caused and less energy is consumed.
#14096
A
where
B
which
C
when
D
therefore
推荐题目
The meeting was put off because we ________ a meeting without John.
#12900
A
objected having
B
were objected to having
C
objected to have
D
objected to having
Many _______ of years later, the first extremely small plants began to appear on the surface of the water.
#14150
A
millions
B
million
C
million of
D
millions of
It is a great for any man to be able to talk or hear, neither ignorantly nor ridiculously, upon any subject.
#13296
A
advantage
B
chance
C
fun
D
importance
While income worry is _______ rather common problem of the aged, loneliness is another problem that _______ aged parents may face.
#11897
A
a; the
B
the; /
C
a; /
D
the; the