阿摩線上測驗
17. The wheat powder in the air was ignited by a spark, leading to a _____ explosion.
(A) thermostat
(B) thermobaric
(C) thermogram
(D) thermonuclear
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統計： A(6), B(20), C(8), D(14), E(0) #3450033
統計： A(6), B(20), C(8), D(14), E(0) #3450033
