新斯的明治疗重症肌无力的主要作用机制是A．直接激动N1受体B．抑制递质的贮存C．抑制ACh的生物合成D

In the author's opinion, ______.

A．playing chess shows computer's program has been developed into a new stage

B．it is practically possible now that computer can win every chess game now

C．computers even with less than complete data can be programmed to defeat the world champion chess player______.

D．computers can be programmed to play and reason but not learn

A．Portability

B．Reliability

C．Availability

D．Reusability

（71）

A. Portability

B. Reliability

C. Availability

D. Reusability

● A （75） infected computer may lose its data.

（75）

A. file

B. data base

C. virus

D. program

● A （75） infected computer may lose its data.

（75）

A. file

B. data base

C. virus

D. program

This program ______ computer files so they can be easily sent by email.

A．suppresses

B．compresses

C．presses

D．impresses

Inside the computer, the operation system(of another software module called a data communication(71))must decide which program will get control next. Each program remember, is associated(72). a particular front -end port. If a program's data have not yet reached its front - end buffer, there is no point giving that program control. Thus the data communication monitor sends its own(73)signal to the front -end devices next port is polled. Note that the(74)computer speed. The computer never has to wait for a terminal or a communication line. Instead, it is the expressive front - end processor that waits for the slower system(75)to respond.

A．memory

B．control

C．monitor

D．charge

This program ______ computer files so they can be easily sent by email.

A．suppresses

B．compresses

C．presses

D．impresses

（71）

A. Portability

B. Reliability

C. Availability

D. Reusability

A(74)translates a computer program written in a human-readable computer language into a form. that a computer can executabl

A.compiler

B.linker

C.assembler

D.application