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问题
填空题
当TBA/22图案教正TMCC卡显示PH.fAil时,表示()故障.
答案
参考答案:3和4条码电眼同时报警
选择题
—Oh, Jenny, your dress looks nice. Is it new?
—No, I
it since two years ago.
A. had
B. bought
C. have bought
D. have had
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填空题
电弧放电的特点是()较高,电弧不易熄灭,电路具有()的特征。
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