【简答题】在Yo/Δ-11组别变压器Δ侧发生AB两相短路时,对Y侧过电流、低电压保护有何影响?设变压器变比为1。 (1)作出变压器正常运行时的电流相量图; (2)求Δ侧故障电压及故障电流相量; (3)用对称分量图解法分析,对Y侧过电流、低电压保护的影响; (4)反映Δ侧两相短路的Y侧过电流元件、低电压元件、阻抗元件应如何接法。
【多选题】What are Examples of “ harm ” ? ( 多选题 )
B.
unjustified physical or mental injury
C.
unjustified destruction or disclosure of information
D.
unjustified damage to property, reputation, and the environment
【单选题】An architectural firm's blueprints, sketches and other proprietary documents are examples of ____.
【多选题】在碎石沥青混凝土路面施工过程中,其具体组成有( )。
【单选题】All of the phrases below are examples of exchange , except which one?
A.
John purchases a television set from Sears for $350.
B.
Sally votes for her local senator who promises to cut property taxes.
C.
Peter donates his old car to the American Lung Association for a tax deduction.
D.
Walter fails to send his membership renewal dues in time to the American Marketing Association.
【判断题】塞规的通端控制孔的最小极限尺寸,防止孔径过小,检验时应能通过;塞规的止端控制孔的最大极限尺寸,防止孔径过大,检验时不应通过。