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2 A Step-Down Converter Package TDFN33-101 Marking ZSXYY2 Manufacturing Part Number AAT1153IDE-0.6-T13 Evaluation Board Part Number AAT1153IDE-0.6-EVB 1 The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead termi...
C.costD.spend 【答案】A 【解析】 考查动词辨析。句意:微笑无需付出,却给予很多。spend花费,Sb. spend some money/some time on/doing sth.主语是人,经常与on连用,跟动词用动名词形式;cost花费,Sth. cost sb. some money,主语是物,人和钱作其宾语。本题中a smile是物,用cost。主语A smile是单数名词,...