日常选择加速器电子束能量的范围在()
A、4~25MEV
B、4~25MV
C、4~18MV
D、6~18MEV
E、6~35MEV
参考答案:A
The H1N1 flu spread very quickly at the beginning, __________, many people were ill.
A.therefore
B.instead
C.in advance
D.however
实施党建统领战略,必须加强党的思想建设,用()引领社会思潮。
A.先进文化
B.社会主义荣辱观
C.社会主义核心价值体系