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【简答题】
一产品装配线计划每班出产 300 件产品,每班用于生产的时间是 500 分钟。表 1 是装配工序、每道工序的作业时间及紧前工序等信息。请:( 1 )画出装配工序先后顺序图;( 2 )该装配线的节拍是多大;( 3 )计算每小时装配 300 件产品的最小工作地数。 工序 工序作业时间(分钟) 紧前工序 A 0.69 - B 0.55 A C 0.21 B D 0.59 B E 0.70 B F 1.10 B G 0.75 C,D,E H 0.43 G,F I 0.29 H
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举一反三
【单选题】—— Was that the new comer who walked by? —— ＿＿＿＿＿.
A.
It must be that
B.
It must have been
C.
He must be
D.
This must have been
【单选题】关于光敏二极管和光敏三极管，下列说法错误的是（ ）。
A.
光敏三极管的光电流比光敏二极管大的多。
B.
光敏三极管的响应时间比光敏二极管长的多。
C.
光敏三极管的线性特性比光敏二极管差。
D.
光敏三极管的暗电流比光敏二极管大的多。
【简答题】阅读理解。 It's not a new phenomenon, but have you noticed how many nouns are being used as verbs? We all use them, often without noticing what we're doing. I was arranging to meet someone for dinner last ...
【简答题】It's not a new phenomenon, but have you noticed how many nouns are being used as verbs? We all use them, often without noticing what we're doing. I was arranging to meet someone for dinner last week, ...
【单选题】——Was that the dean who walked by?—— __________ .
A.
It must be that
B.
It must have been
C.
He must be it
D.
That must have been it
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