阿摩線上測驗
33.The approximate age of a tree can be determined by _____ .
(A) counting the rings
(B) analyzing the structure of the cells
(C) examining the cambium
(D) measuring the width of the rings
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統計： A(126), B(12), C(10), D(19), E(0) #881426
統計： A(126), B(12), C(10), D(19), E(0) #881426
