撤诉
参考答案：撤诉，是指人民法院对已经受理的案件，在作出判决之前，原告向人民法院表示撤回自己的诉讼请求，要求人民法院对案件停止审理的行为。
在使用旋转和缩放工具对对象进行变换时同样来复制对象也可以按住（）。
A、Alt
B、Shift
C、Ctrl
D、Delete
Communication protocols are (66) connection-oriented or connectionless, (67) whether the sender of a message needs to contact and maintain a dialog with the recipient or (68) send a message without any, prior connect and with the hope that the recipient receives everything. (69) .These methods (70) the two ways that communication is implemented on networks.
A．not
B．neither
C．either
D．all
