对放疗最敏感的卵巢肿瘤是
A.颗粒细胞瘤
B.浆液性囊腺癌
C.无性细胞瘤
D.内胚窦瘤
E.未成熟畸胎瘤
参考答案:C
I’m afraid it will cost _________ money.
A. a great many B.a large amount of C. a great number of D. a lot
进入金属容器(炉、塔、釜、罐等)和特别潮湿、工作场地狭窄的非金属容器内作业照明电压不大于12V。