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【简答题】
密码学是研究信息系统安全保密的科学包含两个分支:( )和()。
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皮皮学刷刷变学霸
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【单选题】The life-saving drug invented in 1897, which ________ aspirin, has helped increase the standard of people's health greatly.
A.
was called
B.
is called
C.
has been called
D.
had been called
【单选题】Do you know who is the ______ manager in this company?
A.
person
B.
personal
C.
personnel
D.
personally
【简答题】4 Choose the correct word. ► There was an experiment/exploration to
test the levels of sugar in the blood. experiment 1 These animals only explore/exist in
South America - nowhere else. ____...
【简答题】The improbable chain of s that leads Alexander Fleming 1.______ to discover penicillin in 1928 is the stuff which scientific myths 2.______ are made. It was a discovery that would change the cour...
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