Each box is an activity; the number it contains is the duration of the activity
Each box is an activity; the number it contains is the duration of the activity in days. The duration of the critical path is(75)
A．16days
B．14days
C．19days
D．20days
正確答案：C解析：關(guān)鍵路徑為最長(zhǎng)時(shí)間的線路，3+6+7+1+2=19。
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