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【判断题】
三极管的放大原理可简述为:用基极电流微小的变化去控制集电极电流的较大的变化。
A.
正确
B.
错误
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举一反三
【多选题】改革创新包括(    )。
A.
理论创新    
B.
科技创新    
C.
制度创新    
D.
文化创新
【判断题】计算机的诞生和发展造就了数媒,数媒的发展推动着计算机的前进。
A.
正确
B.
错误
【多选题】改革创新包括
A.
理论创新
B.
制度创新
C.
文化创新
D.
科技创新
【单选题】He has ____ to China for the summer.
A.
come out
B.
come up
C.
come over
D.
come across
【单选题】Professor Green, known to the world as a scientist, is not only absent-minded but short-sighted as well. His mind is always busy 41 scientific problems and seldom notices what is going on 42 him. On...
A.
with
B.
around
C.
for
D.
at
【单选题】Professor Green, known to the world as a scientist, is not only absent-minded but short-sighted as well. His mind is always busy 41 scientific problems and seldom notices what is going on 42 him. On...
A.
for
B.
to
C.
towards
D.
over
【简答题】听对话,选答案。 (     )1. A. To play volleyball. (     )2. A. Red. (     )3. A. $35. (     )4. A. (     )5. A. He has a headache. B. To play chess. B. Green. B. $45. B. B. He has sore eyes. C. To play tennis...
【单选题】Professor Green, known to the world as a scientist, is not only absent-minded but short-sighted as well. His mind is always busy 41 scientific problems and seldom notices what is going on 42 him. On...
A.
when
B.
while
C.
just then
D.
at that  time
【单选题】Professor Green, known to the world as a scientist, is not only absent-minded but short-sighted as well. His mind is always busy 41 scientific problems and seldom notices what is going on 42 him. On...
A.
to think
B.
thinking
C.
thinking about
D.
to think of
【单选题】A 66-year-old man has had cough and worsening shortness of breath for 3 years On examination, there is dullness to percussion at both lung bases and poorly audible breath sounds. On physical examinati...
A.
Atrial myxoma
B.
Essential hypertension
C.
Hyperlipidemia
D.
Rheumatic fever
E.
Smoking
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