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【单选题】
What disaster did the author encounter earlier in his career?A.
His student would fail to be a professional pharmacist.
B.
His students would become savages who only know how to operate machines or push buttons.
C.
He encountered a student who challenged the curriculum which required a pharmacy student to study literature.
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A.
正确
B.
错误
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【简答题】串行数据通信的方向性结构有三种，即单工、全双工和 。
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A.
nouns
B.
noun phrases
C.
prepositional phrases
D.
gerunds
E.
sentences
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【简答题】串行数据通信的方向性结构有三种，即单工、双工和（）