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【单选题】
She has to be very because she hasn’t much money.A.
economic
B.
economical
C.
economics
D.
economy
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【单选题】Robert saved my life in high school and we became ________ friends.
A.
sacred
B.
cherished
C.
lifelong
D.
endearing
【简答题】每段管道预制完毕后应对管道两侧管口进行()。
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