单片机程序存储器的寻址范围是由程序计数器PC的位数决定的，MCS—51的PC为16位，因此其寻址范围是（）

口服补液及时纠正脱水，应用ORS，说法正确的是（）

8031单片机因其片内无（）存储器，需将 引脚接（）电平。8031片外可直接寻址的存储空间达（）KB。

当8051外扩程序存储器16KB时，需要用EPROM2716的片数为（）

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

对于MCS-51系列单片机来说，变址间接寻址可寻址的空间是________。

对于MCS-51系列单片机来说，直接寻址可寻址的空间是________。

对于MCS-51系列单片机来说，立即寻址可寻址的空间是________。