向溶剂转移，主要是影响产品分子量及其分布.
参考答案：对
---Mary, I heard there was an explosion in Luzhou. Could you tell me how it _______?
---Sorry, I don’t know much about it either.
A．came on
B．came about
C．came out
D．came over
什么是说服法？小学德育过程中运用这一方法的基本要求有哪些？
