()主要用于连接和定位。
A.销
B.键
C.轴
D.法兰
参考答案:B
Technology has quickened the rate _________ we communicate with the world around us.
A.for which
B.at which
C.to which
D.with which
下列选项中,保护著作权的国际公约是
A.《巴黎公约》
B.《伯尔尼公约》
C.《罗马公约》
D.《马德里协定》