10.16 One question per day – multiple-choice questions; a reward is given for every correct answer
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(The answer must be given within 24 hours) Multiple-choice question: A factory has a total of 4 workshops, and 2 of these workshops have 4 processing steps each. It is known that in Process Step 2 of Workshop 2, there are two identical reactors with the designation 02 connected in parallel; therefore, in the process flow diagram with control points, the device identifiers for these two reactors are usually denoted as _（）__. A. R020202a, b B. R20202a, b C. R2202-2 D. R2202a, b
D. R2202a, b
D. R2202a, b