【单选题】以下关于直接寻址的特点描述中,正确的是( )。
A.
如果指令字长一定,直接寻址方式下,操作数的表数范围受到指令字长的限制
B.
与变址寻址、基址寻址相比,直接寻址不需要计算有效地址
C.
由于直接寻址实现简单,程序中应多使用该寻址方式
【简答题】The forces that make Japan one of the world's most earthquake-prone(有…倾向的) countries could become part of its long-term energy solution. Water from deep below the ground at Japan's tens of thousands o...
【单选题】In such a changing, complex society formerly simple solutions to informational needs become complicated. Many of life's problems which were solved by asking family members, friends or colleagues are b...
A.
they have to learn new things consciously.
B.
they lack the confidence of securing reliable and trustworthy information.
C.
they have difficulty obtaining the needed information readily.
D.
they can hardly carry out casual communications with an extended family.
【单选题】The emali is from ________to ________.
【简答题】如果每个人都能为保护环境做出自己的贡献,这个世界将变得更加美好。 The world will become much more beautiful if everyone ________ a contribution to ________ the environment.
【单选题】下列寻址方式中,不需要访问存储器的寻址方式为_______