单选题
A network of miniature toxin detectors has been ______ in 30 American cities for the sake of bio-security.
A. deployed B. committed C. indulged D. immersed
A
B
C
D
【正确答案】
A
【答案解析】
deploy：部署；commit：犯(罪或错误)，派兵，be committed to：致力于，对……承诺或有义务；be indulged in：沉迷于；be immersed in：浸泡在，专心于(相当于be absorbed in)
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