There are nine _____books in the library

以下哪些纵隔肿瘤可考虑根治性放疗()

A．淋巴类肿瘤

B．精原细胞瘤

C．浸润性胸腺瘤

D．畸胎瘤

E．神经源性肿瘤

—It was surprising that your brother should have________my sister the moment he saw her yesterday.

—Yes, especially since it had been 30 years since they last saw each other. [ ]

A. picked out  

B. figured out  

C. turned out  

D. worked out

测定水中铵的水杨酸分光光度法的最低检出浓度为（）mg／L：测定上限为（）mg/L。

情绪的特点是（）

A.较稳定的

B.持久存在的

C.带有情境性

D.没有明显的生理变化

E.有明显的生理变化

从能源需求看，2050年全球一次能源中电力需求量达到（）万亿千瓦时。

A.63

B.66

C.73

D.76