阿摩線上測驗
75.How does the embryo of an egg-laying animal obtain nutrients for growth?
(A) from the mother's body;
(B) from the yolk of the egg;
(C) through tiny pores in the shell of the egg;
(D) from the amniotic sac.
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統計： A(0), B(5), C(1), D(1), E(0) #3577804
統計： A(0), B(5), C(1), D(1), E(0) #3577804
