The speed of radio waves is equal to ________of light.
A、those
B、that
C、the one
D、the ones
A、those
B、that
C、the one
D、the ones
第1题
Reagan offered a Chemical Weapons Treaty,but he ______ to resume bilateral (双方的)talks,which might speed agreement.
A.rejected
B.resolved
C.promised
D.declined
第3题
A.turn the radio off
B.turn the radio up
C.turn the radio down
D.turn over the radio
第4题
How much would you ______for repairing my radio?
A.charge
B.cost
C.pay
D.spend
第5题
In 1901, Marconi was able to ______.
A.communicate via radio through the Bristol Channel
B.establish a long distance transmission
C.transmit the first radio messages
D.work with a German physicist
第7题
B.needs repairing
C.needs to repair
D.need to be repairing
第8题
A.more expensive
B.very expensive
C.as expensive
第9题
Would you like me ______ the radio a bit?
A.turning down
B.to turn down
C.turn down
D.turned down