3. PLC处于（ ）模式时，允许进行自由端口通讯。A.RUN模式 B.PROGRAM模式 C. 监控模式 D.都可以 A: A.RUN模式 B: B.PROGRAM模式 C: C. 监控模式 D: D.都可以

【单选题】已知协程方法Run,下列组合,能正常结束协程的是() A. StartCoroutine(Run()); StopCoroutine(Run()); B. StartCoroutine(Run()); StopCoroutine("Run"); C. StartCoroutine("Run"); StopCoroutine(Run()); D. StartCoroutine("Run"); StopCoroutine("Run");

（6-2）线程通过（）方法可以休眠一段时间，然后恢复运行。 A: A．run B: B．setPrority C: C．yield D: D．sleep

It pays ______ to buy goods of high quality. A: in the long run B: in the short run C: at a run D: on the run

He didn't expect to ______ some of his friends here. A: run for B: run over C: run off D: run into

The contract will______at the end of the year. A new one will have to be drawn. A: run out B: run into C: run on D: run after

“跑了和尚,跑不了庙.” 一句正确的译文为( ). A: The monk may run away, but the temple cannot run away with him. B: The monk may run away, the temple cannot run away with him. C: The temple may run away, but the monk cannot run away with it D: Run the monk, run not the temple.

"run up against" = "run out of".( )

Henry's car stopped on the highway. It ( ) out of gas. A: may not run B: may have run C: must run D: ought to run

But for her help, they ___ over the mountain in such a short time. A: couldn't have run B: had not run C: have not run D: could have run