35. What does the word, developer, in the first paragraph mean?
(A) a powder to hurt one’s palm
(B) a powder to poison the criminal
(C) a reagent to reveal fingerprint
(D)a reagent to cover footprint
(E) a chemical material to destroy the crime scene

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統計: A(2), B(4), C(74), D(3), E(3) #820388

詳解 (共 1 筆)

#1327731
reagent  NOUN
A substance or mixture for use in chemical analysis or other reactions:
This compound is a very sensitive reagent for copper

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