机械制图中表面粗糙度符号上的数字50其单位是（） A: umm B: mm C: dmm D: umm
机械制图中表面粗糙度符号上的数字50其单位是（） A: umm B: mm C: dmm D: umm
Jason: Hi, Casey. Hi, Stacey. Welcome to the party. Brownies![br][/br] They ____wonderful. Can I ____one?[br][/br] Stacey: Sure.[br][/br] Jason: Umm. It ____great! Thanks. I love homemade brownies.[br][/br] Casey: Yes, me too.
Jason: Hi, Casey. Hi, Stacey. Welcome to the party. Brownies![br][/br] They ____wonderful. Can I ____one?[br][/br] Stacey: Sure.[br][/br] Jason: Umm. It ____great! Thanks. I love homemade brownies.[br][/br] Casey: Yes, me too.
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