Interrupt Service Routines （ISR) are the )ortions of the program code that handle the inte

A.1

B.2

C.3

D.4

A．Complete the corresponding transaction in the interrupt program

B．Only interrupts are registered in an interrupt program

C．When an interrupt occurs, the interrupt service routine registers the interrupt type in the stack

D．The main function executes the actual interrupt task through infinite loop, and does not distinguish the interrupt priority

A．It can return the computed result to the main function

B．It should be as short as possible to enhance the real-time of the system

C．It should not include complex operations

D．It cannot pass arguments

A、英文全称为 Interrupt Service Routine

B、ISR即中断服务程序

C、ISR代码最后执行一条中断返回指令，返回到之前被中断的程序处继续执行

D、ISR执行过程中不能被其他中断源中断

听力原文： We interrupt this program to bring you a special weather bulletin. (22) The National Weather Service has issued a tornado watch for the following five counties: Douglas, Johnson, Jefferson, Leavenworth and Franklin. (21) The watch will be in effect until ten o'clock tonight or until cancellation by the Weather Service.

Remember, a tornado watch means that weather conditions are favorable for the formation of a funnel cloud. (23) A tornado warning means that a funnel cloud has been sighted. As yet, no tornado warnings have been issued for any of the counties in the area.

Until what time will the tornado watch be in effect？

A．10 o'clock tonight.

B．2 o'clock in the morning.

C．2 o'clock in the afternoon.

D．10 o'clock in the morning.

A、办事处副经理/代表处副国代及项目经理等Deputy Chief Representative of the representative office and project manager etc;

B、办事处经理/代表处国代 Chief Representative of the representative office;

C、产品支持部部长 Director of Customer Service Department;

D、客户

Weather Service has issued a tornado watch for the following five counties: Douglas, Johnson, Jefferson, Leavenworth and Franklin. The watch will be in effect until ten o'clock tonight or until cancellation by the Weather Service.

Remember, a tornado watch means that weather conditions are favorable for the formation of a funnel cloud. A tornado warning means that a funnel cloud has been sighted. As yet, no tornado warnings have been issued for any of the counties in the area.

Until what time will the tornado watch be in effect？

A．10 o'clock tonight;

B．2 o'clock in the morning.

C．2 o'clock in the afternoon.

D．10 o'clock in the morning.