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【多选题】
关于各种活性污泥运行方式,下列说法正确的是A.
渐减曝气法克服了普通曝气池供氧与需氧之间的矛盾；
B.
完全混合式曝气池克服了传统推流式曝气池不耐冲击负荷的缺点
C.
间歇式活性污泥法容易发生污泥膨胀
D.
吸附再生法不适合处理溶解性有机物含量较高的废水；
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A.
compare
B.
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C.
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D.
estimate
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【简答题】当 时, 恰为函数 的全微分.
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A.
wait
B.
to wait
C.
waiting
D.
waited
【单选题】I'm sorry ____ so long, I forgot to tell you in advance where I had put my key.
A.
to keep you wait
B.
to keep you waiting
C.
to keep you waited
D.
to have kept you waiting
【简答题】工业机器人可与外部设备集成为一个功能单元,例如 , , 等。
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【单选题】--Do you know Professor Yu, an outstanding expert in computers? --Exactly. But I _____ with him for about five years. A. have been in touch B. have lost touch C. have been out of touch D. ...
A.
B.
C.
D.
D
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