羊水栓塞(amnionic fluid embolism)
参考答案:
是指在分娩过程中羊水突然进人母体血循环引起急性肺栓塞、休克、发生DIC、肾功衰竭或突然死亡的分娩严重并发症。
我国化学家张青莲教授测定了铱元素(Ir)的相对原子质量新值。已知铱原子的原子核外电子数为77。下列说法中正确的是 [ ]
A.铱元素为非金属元素
B.铱原子核内的中子数为77
C.铱原子核内的质子数为77
D.铱原子的相对原子质量为77
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.pattern B.models C.metadata D.components