18. In your research paper, do use the _____ “kg” for “kilograms,” without
any period after it.
(A) abbreviation
(B) confrontation
(C) isolation
(D) vacation
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統計: A(241), B(57), C(45), D(5), E(0) #2077737
統計: A(241), B(57), C(45), D(5), E(0) #2077737