使用perf工具的哪个命令可以即时查看整个系统中各个程序的综合profiling统计 A: perf top B: perf record C: perf report D: perf stat

An advantage of a ring counter over a Johnson counter is that the ring counter ( ). A: has more possible states for a given number of flip-flops B: is cleared after each cycle C: allows only one bit to change at a time D: is self-decoding

关于time库的说法错误的是( )。 A: time库提供获取系统时间和格式化输出的功能 B: time库是Python中处理时间的标准库 C: time.perf_counter_ns()返回一个小数 D: time.sleep(n)的作用是使当前线程休眠n秒

Which counter should the passenger go to? A: Counter 4 B: Counter 14 C: Counter 17

Where is my watch? It’s on the __________. A: kitchen counter B: kitchen’s counter C: counter kitchen D: counter of kitchen

perf工具可以用于测试CPU性能。

Private Sub Form_Click() Dim Check, Counter Check = True Counter = 0 Do Do While Counter < 20 Counter = Counter + 1 If Counter = 10 Then Check = False Exit Do End If Loop Loop Until Check = False Print Counter; CheckEnd Sub程序运行后，单击窗体，输出结果为______。 A: 15 0 B: 20 -1 C: 10 True D: 10 False

阅读下面的程序： PriVate Sub Form_C1ick() Dim Check As Booleau，Counter As Integer Check=True Counter=5 Do Do While Counter＜20 Counter=Counter+1 If Counter=10 Then Check=FalSe EXit Do End If Loop Loop Until Check=FalSe Print Counter End Sub 程序运行后，单击窗体，输出结果为______。

transit counter

In what aspects can we make a counter offer?We can make a counter offer on ___, ___, ___, ___, ___, ___ and etc.