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【单选题】
在采购中,负责具体采买的经办人的角色是A.
资金型决策人
B.
用户型决策人
C.
顾问型决策人
D.
技术型决策人
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】For a diesel engine, when the piston is at the _____, the clearance volume is the largest.
A.
TDC
B.
DTC
C.
BDC
D.
DBC
【单选题】The clearance volume for a single stage compressor is defined as the space created between the （）.
A.
top of the piston and bottom side of head, with the piston at BDC
B.
piston and head, including the space around the piston to the top of the upper ring and under the valves, with the piston at TDC
C.
bottom of the piston and bottom side of the head at TDC, regardless of upper ring location and valve placement
D.
top of the piston and bottom side of the head at TDC as compared to that which exists between the top of the piston and bottom side of head at BDC
【简答题】构造套接口后,网络上具有唯一性的( )地址和( )号结合在一起,才能构成唯一能识别的标识符。
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