(单选题) 20: Theories have been proposed by astronomers to ______ electrical disturbances (干扰) in the atmosphere.
A: apply for
B: allow for
C: account for
D: appeal for
(责任编辑:admin) |
(单选题) 20: Theories have been proposed by astronomers to ______ electrical disturbances (干扰) in the atmosphere.
A: apply for
B: allow for
C: account for
D: appeal for
(责任编辑:admin) |