执行以下程序,输入ab,然后按Enter键,输出结果是( ) 。k=10while True:s = input('请输入q退出:')if s == 'a':k +=1continueelse:k +=2breakprint(k)
A. 13
B. 请输入q退出:
C. 12
D. 10
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以下程序的输出结果是:Is = [12,44,23 ,46]for i in ls:if i == '44':print( 'found it ! i = ',i)breakelse:print( 'not found it···')}
A. not found it ···
B. found it ! i= 44
C. found it ! i = 44not found it ···
D. found it ! i= '44'not found it ···
以下语句不会引发异常的是:
A. a=b=3+1j
B. 1 +"1"
C. 3/ 0
D. print " no error"
以下程序输出的图形是:for i in range(-3,4):if i < 0:print(' '*(-i)+'*'*(4+i))elif i > 0 :print(' '*3+'*'*(4+i))else:print('* '*7)
A. * * * * * * * * * * * * * * * * * * *
B.
*
* *
* * *
* * * * * * *
* *
*
C. *
* * * * * * * * * * * * * * * * * * * * * * * *
D. * * * * * * * * * * * * *
实验中量取5mL溶液,用下列哪种仪器量取准确度最高?
A. 移液管
B. 刻度吸量管
C. 奥式吸量管
D. 量筒
E. 锥形瓶