在氧化物系列和碳化物系列磨料中,磨削硬质合金时应选用()砂轮
A、棕刚玉
B、白刚玉
C、黑色碳化硅
D、绿色碳化硅
参考答案:D
下列各项中书写完全正确的一项是【 】
A.越俎代庖余音绕粱犹豫不决摇摇欲堕
B.忧心忡忡原形必露因陋就简引亢高歌
C.雍荣华贵英雄倍出义不容辞揠旗息鼓
D.眼花缭乱月明星稀以逸待劳言简意赅
The software architecture of a program or computing system is the structure or structures of the system, which comprise software______, the externally ______ properties of those components, and the relationships between them. The architecture is not the operational software. Rather, it is a ______ that enables a so, ware engineer to: analyze the ______ of the design in meeting its stated requirements, consider architectural alternatives at a stage when making design changes is still relatively easy, and reduce the ______ associated with the construction of the software.
A.visible B.reliable C.secure D.robust