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【单选题】
使钢产生热脆的元素是 。A.
S
B.
P
C.
O
D.
Si
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举一反三
【单选题】( )4.How long has the bike been part of Thomas’ life?
A.
Since January
B.
Since last year.
C.
For a month.
D.
For a year.
【简答题】We know the famous ones—the Thomas Edisons and the Alexander Graham Bells —but what about the less famous inventors? What about the people who invented the traffic light and the windshield wiper(雨刮器)？...
【单选题】Conversation 2 6
A.
Going to the high street.
B.
Visiting everyday shops.
C.
Visiting shops and buying online.
D.
Buying things like electrical goods.
【单选题】How long does the Grand Slam tournaments, Wimbledon , last?
A.
One week.
B.
Two weeks.
C.
One month.
D.
Ten days.
【单选题】How long will it take for the panels to pay for themselves?
A.
It will take 50 years.
B.
It will take 5 years.
C.
It will take 500 years.
【单选题】Conversation 2 6
A.
Getting some celebrity endorsements.
B.
Inventing some fashionable products.
C.
Putting up some fascinating ads.
D.
Setting up activities for youngsters.
【单选题】We know from the passage that ______. ( )
A.
exposure to even tiny amounts of radiation is fatal
B.
the effect of exposure to radiation is slow in coming
C.
radiation is avoidable in space exploration
D.
astronauts in spacesuits needn't worry about radiation damage
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