下列关于标幺值等值网络说法正确的是()。
A.标幺值是相对值
B.线电压和相电压的标幺值相同
C.计算结果清晰,易于判断结果的正确性
D.以上说法都正确
参考答案:D
导致输卵管妊娠的常见原因是()
A.慢性盆腔炎
B.输卵管黏膜炎和输卵管周围炎
C.输卵管切除术后
D.输卵管过长
E.放置宫内节育器
A project manager believes that modifying the scope of the project may provide added value service for the customer.The project manager should______.
A.assign change tasks to project members
B.call a meeting of the configuration control board
C.change the scope baseline
D.postpone the modification until a separate enhancement project is funded after this project is completed according to the original baseline