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【单选题】
参与呼吸链中传递电子的金属离子是A.
铁离子
B.
钴离子
C.
镁离子
D.
锌离子
E.
氯离子
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举一反三
【单选题】I have only _____ uncle. His birthday is May _____ . [ ]
A.
one; one
B.
first; one
C.
one; first
D.
first; first
【单选题】The example of Holland in the first paragraph shows that ______.
A.
every government is conserving nature
B.
people are changing the earth
C.
people's technology is good to nature
D.
we can live without plants, trees and flowers
【单选题】The first three rows of the hall are ______ for special guests.
A.
preserved
B.
reserved
C.
conserved
D.
served
【简答题】The First of May is a Bank Holiday—the first public holiday of the year in England. Most people consider it a special day, the beginning of summer, a day when the light lasts long into the evening, an...
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