动力学裂解深度函数综合考虑了()效应。
A、烃分压
B、原料性质
C、停留时间
D、裂解温度
参考答案:B, C, D
She _________ wash the dishes now.
A.not has to
B.not have to
C.doesn’t has to
D.doesn’t have to
违法行为,亦成违法,是指人们违反法律的,客观上危害社会的行为。