阿摩線上測驗
16. A variety of subsurface geometrical ______are found in nature, and a great number of tools are available for their exploration.
(A) compartments
(B) complications
(C) combinations
(D) configurations
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統計： A(64), B(46), C(86), D(136), E(0) #3414309
統計： A(64), B(46), C(86), D(136), E(0) #3414309
