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【单选题】
飞机燃油系统的增压泵通常使用A.
齿轮泵；
B.
旋转泵；
C.
离心泵；
D.
手摇泵。
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举一反三
【单选题】Twain was a man who became obsessed with the frailties of the human race, who saw clearly ahead a black wall of night.
A.
processed
B.
observed
C.
occupied
D.
absorbed
【单选题】清除本地DNS缓存的命令为( )
A.
ipconfig/setclass
B.
ipconfig/flushdns
C.
ipconfig/regeditdns
D.
ipconfig/renew
【单选题】... a man who became obsessed with the frailties of the human race, who saw clearly ahead a black wall of night.
A.
processed
B.
observed
C.
occupied
D.
absorbed
【单选题】... a man who became obsessed with the frailties of the human race, who saw clearly ahead a black wall of night.
A.
certainty
B.
cruelty
C.
moral weaknesses
D.
credulity
【单选题】Which of the following statements can we know from the fourth paragraph?
A.
Distinguished professors at research universities should focus on research only.
B.
The separation of teaching from research may affect the quality of future scientists.
C.
It is vitally important to improve teaching in elementary schools in order to train new scientists.
D.
It is impossible to combine research with teaching due to the rapid development of modern science.
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