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【判断题】
( ) 检验工序一般安排在粗加工之后,精加工前、后,重要工序和工时长的工序前、后,零件全部完工后。A.
正确
B.
错误
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举一反三
【简答题】理想的安全评价分为 。
【简答题】命题p:三角形的内角和等于180 ,则
【简答题】命题 p :三角形的内角和等于 180 o,则¬p:
【多选题】Which three IP multicast group concepts are true?（）
A.
If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.
B.
A router does not have to be a member of a multicast group to receive multicast data.
C.
A router must be a member of a multicast group to send to the group.
D.
A router does not have to be a member of a multicast group to send to the group.
E.
If a packet is sent to a multicast group address, all members of the multicast group will rece ive it.
F.
A router must be a member of a multicast group to receive multicast data.
【单选题】In the group discussion, they thought up three different __________to solving the environmental problem.
A.
approaches
B.
means
C.
ways
D.
methods
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