网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
At the beginning of the day, the prices of stocks X and Y are the same. At the end of the day, the price of stock X has increased by 1/20 of its original price and the price of stock Y has decreased by 1/20 of its original price. The new price of stock X is what fraction of the new price of stock Y?
A
2/20
B
19/21
C
21/19
D
18/20
E
20/18
参考答案
参考解析
解析：
Plugging in. Suppose the prices of stocks X and Y were each $100 at the beginning of the day. Then：The new price of stock X is $105. The new price of stock Y is $95. stock X/stock Y =l05/95= 21/19.
Plugging in. Suppose the prices of stocks X and Y were each $100 at the beginning of the day. Then：The new price of stock X is $105. The new price of stock Y is $95. stock X/stock Y =l05/95= 21/19.
更多 “单选题At the beginning of the day, the prices of stocks X and Y are the same. At the end of the day, the price of stock X has increased by 1/20 of its original price and the price of stock Y has decreased by 1/20 of its original price. The new price of stock X is what fraction of the new price of stock Y?A 2/20B 19/21C 21/19D 18/20E 20/18” 相关考题
考题
下列哪些代码段是正确的?()
A.X x=new X();Y y=new Y();Z z=new Z();y=(Y)x;B.X x=new X();Y y=new Y();Z z=new Z();x=(X)y;C.X x=new X();Y y=new Y();Z z=new Z();Z=(Z)x;D.X x=new X();Y y=new Y();Z z=new Z();W w=(W)x;
考题
（53）下列关于函数依赖和多值依赖的叙述中，（ ）是不正确的。Ⅰ、若X→Y，则X→→Y Ⅱ、若X→→Y，则X→YⅢ、若Y í X，则X→Y Ⅳ、若Y í X，则X→→YⅤ、若X→Y，Y* ì Y，则X→Y* Ⅵ、若X→→Y，Y*ìY，则X→→Y*A）仅Ⅱ和ⅣB）仅Ⅰ、Ⅱ和ⅣC）仅Ⅱ和ⅥD）仅Ⅳ、Ⅴ和Ⅵ
考题
有以下程序： Class Date { public： Date(int y，int m，mt d)； { year=y； month＝m； day＝d； } Date(int y＝2000) { year＝y； month＝10； day＝1； } Date(Date D) { year＝d.year； month＝d.month； day＝d.day； } Void prinA．2B．3C．4D．5
考题
Our stocks include a wide range of first-class electrical typewriters at very competitive prices.They have the correcting and automatically storing system. From the catalogues enclosed, you will find that our prices are much lower than those in the market.(英译中)
考题
有以下程序： class Date { public： Date(int y,int m,int D) ； { year =y； month=m； day=d； } Date(int y=2000) { year=y； month=10； day=1； } Date(Date D) { year=d.year； month=d.month； day=d.day； } void print () { cout＜＜year＜＜"．"＜＜month＜＜"."＜＜day＜＜end1； } private： int year,month,day； }； Date fun(Date D) { Date temp； temp=d； return temp； } int main() { Date date1(2000,1，1)，date2(0，0,0)； Date date3(date1)； date2=fun(date3)； return 0； } 程序执行时，Date类的拷贝构造函数被调用的次数是A．2B．3C．4D．5
考题
下面语句正确的是A.If xy Then y=x^3B.If xy Then y=x3C.If x
下面语句正确的是A．If x＜3 * y And x＞y Then y＝x^3B．If x＜3 * y And x＞y Then y＝x3C．If x＜3 * y:x＞y Then y＝x^3D．If x＜3 * y And x＞y Then y=x* *3
考题
有以下程序： Class Date {public： Date(int y，int m，int d)； {year＝y； month=m； day＝d；} Date(int y＝2000) {year＝y； month＝10； day=1；) Date(Date D) {year＝d.year； month＝d.month； day＝d.day；} void print() {cout＜＜year＜＜“.”＜＜moA．2B．3C．4D．5
考题
A.f(-x，y)=f(x，y)，f(x，-y)=-f(x，y)
B.f(-x，y)=f(x，y)，f(x，-y)=f(x，y)
C.f(-x，y)=-f(x，y)，f(x，-y)=-f(x，y)
D.f(-x，y)=-f(x，y)，f(x，-y)=f(x，y)
考题
下列选项中，能正确地将x和y两个变量中的数据进行交换的表达式是（）。A、x＝x+y y＝y+x x＝x+yB、x＝x+y y＝x-y x＝x-yC、x＝x+y y＝y-x x＝x-yD、x＝x-y y＝x-y x＝y-x
考题
已知元素X、Y的核电荷数小于31，且能形成XY2型的化合物。回答下列问题： （1）若X、Y均为非金属元素，写出你所知道的XY2的化学式：（）、（）、（）、（）等。 （2）若X原子的外围电子层排布为3d104s2，Y可能是（）元素或（）元素（写元素符号）。 （3）若Y的阴离子与Ar有相同的电子层结构，则X的原子外围电子层排布构型有：（）、（）、（）、（）、（）、（）、（）。
考题
单选题At the beginning of the day, the prices of stocks X and Y are the same. At the end of the day, the price of stock X has increased by 1/20 of its original price and the price of stock Y has decreased by 1/20 of its original price. The new price of stock X is what fraction of the new price of stock Y?A
2/20B
19/21C
21/19D
18/20E
20/18
考题
单选题There will usually be summaries or daily account tables for heavy oil, diesel oil, lubricating oil, and fresh water, which will be compiled（）A
at the beginning of every watchB
at the beginning of the first watch every dayC
at the completion of every watchD
at noon every day
考题
单选题As stock prices plunged during the banking crisis, some investors were beginning to lose hope.A
tumbledB
dispersedC
collapsedD
dripped
考题
单选题The receding prices of these stocks sent many investors panicking and despairing.A
diminishingB
soaringC
flourishingD
piercing
热门标签
最新试卷