A-A+
A．By grinding heated limestone (石灰石) and clay
问题详情
A．By grinding heated limestone (石灰石) and clay and mixing them with water.
B．By mixing limestone, clay and water.
C．By grinding limestone and clay under water.
D．By burying limestone and clay underground.
参考答案
正确答案：A
解析：事实题。浏览选项可知，本题问的是做某件事的“方式”，听录音时要捕捉到这个相关的信息，并做好标记。水泥制造工序中的关键词为grind，heated，mixed和water，在正确答案A中都得以体现。其他选项不完整或是词语的胡乱拼凑。
