如何鉴别絮凝剂的质量?如何保存?
参考答案:
常见絮凝剂鉴别方法:主要由絮凝剂的成分和形状来鉴别。
常见絮凝剂的保存方法:保存在通风、阴凉、干燥的地方,注意防湿、防潮解。
One of the men held the view ____ the book said was right.
A.what that
B.what
C.that
D.that what
门与窗在建筑中的作用?