流程式生产一般为备货型生产，加工装配式生产既有备货型生产又有订货型生产
参考答案：对
Scientists estimate that plants and animals lived _____ 3.5 billion years ago. [ ]
A. as far as
B. as many as
C. as long as
D. as old as
学了《走一步，再走一步》这篇文章你一定深有感触，请你以“在生活中我们总有感觉自己没有分量的时候，我提醒自己说：不要……而要……直到……”为例写三到五句话。
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