【单选题】No one, except his two best friends, ______ where he is.
【判断题】异步传输的数据以字符为单位,字符间的发送时间是异步的,以字节为单位,并以起始位和停止作为分隔,也就是说,后一个字符与前一个字符的发送时间不确定。
【判断题】异步传输是以字节为传输单位,每个字符都要附加 1 位起始位和 1 位停止位,以标记一个字符的开始和结束,并以此实现数据传输同步。【 】
【判断题】异步传输传输单位为字节,并以起始位和停止位作为分割。
【简答题】磁性固位种植义齿是利用磁体的特性,将衔铁固定于______,而将永磁体固定于相对应的______,借助______增加覆盖式种植义齿的固位。
【单选题】Consider two corporate bonds identical in all respects except that one has a call provision and the other has not. The return on the callable bond should be______.
A.
higher than that on the noncallable bond
B.
lower than that on the noncallable bond
C.
the same as that on the noncallable bond
D.
that one cannot tell which one of the two bonds should have a higher return
【单选题】No one, except his two best friends, ______where he is.