液体在燃烧过程中,不是液体本身在燃烧,而是液体受热时先蒸发为蒸气,蒸气受热后再发生(),温度达到自燃点再燃烧。
A、热分解、氧化
B、裂变
C、链引发
D、链传递
参考答案:A
At present an increasing number of parents wish to _________ changes in educating their children due to dissatisfaction with the educational system.
A.set out
B.bring about
C.set up
D.bring up
会计主体假设为会计核算规定了时间范围。 ( )