电导法测量过程中,利用铂黑电极测量小电导溶液时,铂黑会吸附溶剂,造成电导不稳定()。
参考答案:对
The government officials made a quick reaction _______ the news of the earthquake. [ ]
A. having heard
B. heard
C. being heard
D. on hearing
衡量燃油在储存、运输中防火的指标是()
A.馏程
B.自燃点
C.闪点
D.燃点