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【判断题】
脑的萎缩可以是生理性或病理性原因引起的。 A. 对 B. 不对A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】max 4x1—3x2+5x3 s．t． 3x1+x2+2x3≤15， 一x1+2x2—7x3≥3， x1 +x3=1， x1，x2，x3≥0．
【单选题】The money collected should be made good use the people in South Asia who suffered a lot in the killer earthquake and tsunami（海啸）.
A.
of helping
B.
to help
C.
to helping
D.
of to help
【单选题】The money collected should be made good use _____ the people in Taiwan who suffered a lot in the earthquake. [ ]
A.
of helping
B.
to help
C.
to helping
D.
of to help
【单选题】She ___________ his number in the phone book to make sure that she had got it right.
A.
looked for
B.
looked after
C.
looked over
D.
looked up
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