汽轮机热态启动时主蒸汽温度应在高于高压缸上缸内壁温度（）℃｡
参考答案：50以上
_____the rising birth rate and immigration, the declining death rate also resulted in the population
growth. [ ]
A. In addition to
B. In terms of
C. In consequence of
D. In spite of
T1加权像中高信号，质子密度加权像，T加权像高信号，最可能为下列哪种组织（）
A.瘤骨
B.出血性坏死
C.软骨样组织
D.骨样组织
E.骨皮质
