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【单选题】
当变压器外部故障时，有较大的穿越性短路电流流过变压器。这时变压器的差动保护（）。A.
应立即动作
B.
不应动作
C.
视短路时间长短动作
D.
视短路性质而定
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皮皮学刷刷变学霸
举一反三
【单选题】What’s different today from when Alison Lurie’s book was written in 1981?
A.
There’s a sense of purpose and occasion which suggests the clothes we should wear.
B.
Everyone wears whatever makes them look good.
C.
Everyone wears whatever makes them feel most comfortable.
D.
Clothes express aspects of ourselves that we don’t have the words to describe.
【单选题】听力原文：Will you please pass me the book? (5)
A.
Sure. Give it to you.
B.
Take it.
C.
Sure. Here you are.
D.
Hold it.
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