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【多选题】
数控机床给驱动装置常用的通讯指令接口有( )三种、、。采用该方式控制进给驱动装置时,数控装置和进给驱动装置之间只要一根通讯电缆即可完成对进给驱动装置的所有控制,并获得其所有工作信息。A.
RS232
B.
RS422
C.
RS485
D.
RS520
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【单选题】It is implied that American doctors often______.
A.
trade their professionalism for financial benefits
B.
fail to recognize the paying power of the patients
C.
discuss about how to make money during the surgery
D.
give the patients expensive but needless treatments
【简答题】新视野视听说 Book 3 Unit 3 Page 39(3)
【单选题】It is implied that American doctors often______.
A.
trade their professionalism for financial benefits
B.
fails to recognize the paying power of the patients
C.
discuss about how to make money during the surgery
D.
gives the patients expensive but needless treatments.
【简答题】共射极应用时晶体管的电流分配关系为______，其中穿透电流是I CBO 的______倍，它随温度的升高而______，所以它是电子器件高温下失效的根本原因。
【单选题】The video game developed by Erik Hauser______.
A.
contributes to the elimination of financial illiteracy
B.
offers a brief tutorial to those who are willing to play
C.
engages kids' attention by providing instant message
D.
gratifies its players instantly by offering cash to them
【简答题】共射极应用时晶体管的电流分配关系为_________，其中穿透电流是ICBO，的_________倍，它随温度的升高而_________，所以它是电子器件高温下失效的根本原因。
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