防火间距就是当一幢建筑物起火时，其它建筑物在热辐射的作用下，没有任何保护措施时，也不会起火的最小距离。
参考答案：对
I wanted to help those homeless children in the Big Earthquake,
_______ I donated my pocket money that I had saved for two months.[ ]
A. so
B. because
C. since
怎样确定乳化液泵的流量？
