33 In the gravity-free environment, our body cannot _______ up from down. Its internal balance system sends
confusing signals to the brain, which can result in nausea.
(A)distinguish
(B)extinguish
(C)accomplish
(D)relinquish
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統計: A(435), B(114), C(142), D(83), E(0) #1456262
統計: A(435), B(114), C(142), D(83), E(0) #1456262