DVS传输信号正常的判断一般是通过（）
A.光端机
B.光纤收发器
C.电脑
参考答案：B
《国际歌》的词作者是谁：
A.马克思
B.鲍狄埃
C.贝多芬
The press conference was concerned _______ the Diaoyu Islands issue and every journalist present was concerned _______ China’s final decision.
A．with, for
B．about, with
C．with, with
D．about, about
