如果立式油罐中各层的相态组成有差异，通常情况下可以通过加热将油脂均质后再扦样。
参考答案：对
— How are the things in your village?
— Modern farming methods have been brought in and the villagers are ________ now than before.
A．well off
B．better off
C．badly off
D．worse off
使用喷灯必须注意些什么？
