阿摩線上測驗
48. What has been done about the space trash problem?
(A) Scientists have cleaned up most of the trash.
(B) Large pieces of space trash are being closely watched.
(C) Many nations have worked together to stop polluting space.
(D) Ground stations are built to help store the trash properly in space.
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統計： A(16), B(51), C(19), D(15), E(0) #490912
統計： A(16), B(51), C(19), D(15), E(0) #490912
詳解 (共 3 筆)
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#799432
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