______ as much as one-fourth of all material harvested is not used. ( )(本题2.0分) A、 The estimate B、 The estimate that C、 They are estimated D、 It is estimated

______ as much as one-fourth of all material harvested is not used. ( )(本题2.0分)
A、 The estimate
B、 The estimate that
C、 They are estimated
D、 It is estimated

出自：华北水利水电大学混凝土结构设计原理

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