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【简答题】
She has two best friends. _____of them is in the country. A: Both B; All C; Neither
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反馈参考答案：
举一反三
【单选题】I want to know ______ for the class yesterday morning. [ ]
A.
why did you come late
B.
why you came late
C.
why do you come late
D.
why have you come late
【简答题】试述自动空气断路器的主要作用?
【简答题】自动空气断路器的作用是什么?
【简答题】变压器油在多油断路器中起()和()作用，在少油断路器中仅起()作用。
【简答题】开场陈述的策略有哪些？
【单选题】There is l30 reason why you shouldn’t tell them beforehand that you are leaving．
A.
in advance
B.
ahead
C.
before long
D.
early
【简答题】真空断路器的真空作用是___和___。
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