if=="炒菜"啥意思

来源：蜘蛛抓取(WebSpider) 时间：2017-06-17 06:09 标签： if 1 0 什么意思
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请教JAVA前辈：在javascript中window.open("index.jsp","_parent")中，_parent参数是什么意思？
就是当前窗口的父亲窗口，当前窗口是从父窗口弹出来的，是它生的。
opener A reference to the Window object that opened this one, or null if this window was opened by the user. parent If the current window is a frame, a reference to the frame of the window that contains it. self A self- a reference to the current Window object. A synonym for window. top If the current window is a frame, a reference to the Window object of the top-level window that contains the frame. Note that top is different from parent for frames nested within other frames. --------when u meet a unknow parameter of Javascript.First step,search the web.Second,read JavaScript.The.Definitive.Guide.4th.Edition and then write some codes to practice.The last,go to a forum and post a new thread for your question.
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Code & 2002-20已解决问题
=IF(D2=0,&&,D2)这个函数什么意思，请帮忙解释一下。中间有这个& ,&&, &又是什么意思？
提问时间： 06:03:16
=IF(D2=0,&&,D2)这个函数什么意思，请帮忙解释一下。中间有这个&,&&,&又是什么意思？
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就这个公式进行解释：COUNTIF（参数1，参数2）此函数用来统计条件限制下的单元格数量。就COUNTIF(D:D,D2)而言，其含义是D2单元格的值在D列出现的次数，如果次数为1，那么D2单元格的值在D列是唯一的；如果次数大于1，那么D2单元格的值在D列不是唯一的，也就是有重复值。
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&If I rest
rust &——would be an excellent motto for those who are troubled by the slightest bit of idleness．Even the most hard-working person might adopt it with advantage to serve as a reminder that
if one allows his abilities to rest
like the iron in the unused key
they will soon show signs of rust and
eventually
cannot do the work required of them．
Those who would attain the heights reached and kept by great men must- keep their ability polished by constant use
so that they may unlock the doors of knowledge
the gate that guard the entrances to the professions
to science
literature
agriculture—every department of human endeavor．
Industry keeps the key bright that opens the treasury of achievement．If Hugh Miller
after toiling all day in a quarry
had devoted his evenings to rest and recreation
he would never have become a famous geologist．The celebrated mathematician
Edmund Stone
would never have published a mathematical dictionary
never have found the key to science of mathematics
if he had given his spare moments to idleness
had the little Scotch lad
allowed the busy brain to go to sleep while he tended sheep on the hillside instead of calculating the position of the stars by a string of beads
he would never have become a famous astronomer．
Labor defeats all—not inconstant
or ill- but faithful
persistent
daily effort toward a well-directed purpose．So industry is the price of noble and enduring success．
1.What may be the meaning of the underlined word &rust& in the 1st paragraph?
2.Why does a hardworking person even use the motto? Because ______．
A．he wants to remind himself that he is a hardworking man．
B．he wants to remind himself to rest from time to time
C．he is afraid that he may idle
D．he feels he can do the work required of them．
3.By saying &Those who would attain the heights reached and kept by great men must keep their ability polished by constant use&
the author means_______．
A．great men keep their ability polished
B．those who use their ability constantly would attain the great
C．those who want to get great achievements must practice their ability
constantly
D．great men polish their ability to reach their height
4.The main point of the 3rd paragraph is that ______
A．industry is more important than agriculture．
B．giving some examples of how industry works in achieving great
C．what industry really means here
D．industry can keep the keys bright
兔亜lgJI23OQ30
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文章讲述的是要想取得一定的成就，需要经常使用或者练习相应的技巧或者知识。
1.事实细节题，根据Even the most hard-working person might adopt it with advantage to serve as a reminder that
if one allows his abilities to rest
like the iron in the unused key可知。
2.事实细节题，根据第一段的would be an excellent motto for those who are troubled by the slightest bit of idleness可知，
3.推理判断题，该句意为只有经常的练习自己的能力，知识才能取得巨大的成就
4.事实细节题，根据该段提供的几个例子可知，该段提供了一些关于工业如何取得成功的例子。
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