设数据总线上接有A、B、C、D四个寄存器，要求选用合适的74系列芯片，完成下列逻辑设计：

设计一个电路，实现下列操作：
T0时刻完成D→总线；
T1时刻完成总线→A；
T2时刻完成A→总线；
T3时刻完成总线→B。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

信息在总线上的传送方式有（）传送、（）传送和（）传送。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

（）实现在一对传输线上同时传送多路信号。

地址总线是传送地址信息的一组线，总线还有数据总线和（）总线。

内部总线是CPU内部连接各逻辑部件的一组数据传输线，它采用三态门和多路开关来实现。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。