有下列程序段： x=0 n=0 Do While x＜50 x=(x+2)*(x+3) n=n+1 Enddo n,x 该程序段的执行结果为______。
A．1和0
B．2和72
C．3和50
D．4和168
参考答案：B
解析：[分析] 本题考查的是Do…While循环。X赋值0，首先判断Do…While后面的条件“x＜50”为.T.，执行一次循环体得到x的值为6，n的值为1；再次判断条件“x＜50”为.T.，再执行一次循环体得到x的值为72，n的值为2；再次判断条件“x＜50”为.F.，退出循环。
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| Now that I am no longer young, I have friends whose mothers have passed away. I have heard these sons and daughters say they never fully appreciated their mothers__1__it was too late to tell them. I am blessed (赐福) with the dear mother who is still alive. I__2__her more each day. My mother does not change, but I__3__. As I grow older and wiser, I realise__4__an extraordinary person she is. How__5__that I am unable to speak these words in her__6__, but they flow easily from my pen. How does a daughter begin to thank her mother for life itself? For the love, patience and just __7__hard work that go into__8__a child? For running after a toddler (学走步的小孩), for understanding a__9__teenager, for tolerating a college student who knows__10__? For waiting for the day when a daughter__11__how wise her mother really is? How does a__12__woman thank a mother for__13__to be a mother? For being ready __14__ advice (when asked) or keeping __15__when it is most appreciated? For not saying, "I told you so", when she could have uttered these words__16__? For being__17__herself-loving, thoughtful, patient, and forgiving? I don't know how, dear God, except to ask you to bless her as richly as she__18__and to help me live up to the example she has__19__. I pray that I will look as good in the eyes of my children as my mother__20__in mine. | |||
| ( )1.A. as ( )2.A. approve ( )3.A. do ( )4.A. how ( )5.A. sad ( )6.A. absence ( )7.A. common ( )8.A. raising ( )9.A. childish ( )10.A. anybody ( )11.A. detects ( )12.A. pretty ( )13.A. failing ( )14.A. by ( )15.A. silent ( )16.A. dozen times ( )17.A. valuably ( )18.A. devotes ( )19.A. set ( )20.A. sees | B．that B．appreciate B．have B．that B．glad B．presence B．plain B．rising B．energetic B．nobody B．discovers B．foolish B．intending B．with B．quiet B．a dozen of times B．essentially B．deserts B．settled B．finds | C．until C．need C．did C．who C．comic C．appearance C．normal C．developing C．fearless C．everything C．recognises C．green C．continuing C．at C．cool C. dozens of times C．commonly C．deserves C．placed C．is | D．when D．resemble D．will D．what D．tragic D．existence D．usual D．training D．moody D．nothing D．realises D．grown D．keeping D．on D．noiseless D．dozen of time D．virtually D．desires D．fixed D．looks |