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更多“I wonder how the doughnuts bea…”相关的问题
A.concludes
B.excludes
C.has
D.includes
有如下程序：
#include
using namespace std;
class Complex
{
double re, im;
public:
Complex(double r, double i):re(r), im(i){}
double real() const{return re;}
double image() const{return im;}
Complex& operator +=(Complex a)
{
re += a.re;
im += a.im;
return *this;
}
};
ostream &operator＜＜(ostream& s,const Complex& z)
{
return s＜＜'('＜
}
int main()
{
Complex x(1, -2), y(2, 3);
cout＜＜(x += y)＜
return 0;
}
执行这个程序的输出结果是
A ． (1, -2)
B ． (2, 3)
C ． (3, 5)
D ． (3, 1)
—That's a beautiful cat. I wonder whom it belongs to.—（).
A.It belongs to the Browns
B.The cat is my favourite too
C.Mind your own business
D.I can’t say anything more
A.Do you take credit card
B.How much is the reservation
C.What can I do for you
D.Do you need a window seat
A.It’s OK. How about you？
B.Going well.
C.Not ba
D.I am fine, thank you.
Television works in much the same way as radio.In radio, sound is changed into electromagnetic waves which are sent through the air.Experiments leading to modern television took place more than a hundred years ago.By the 1920s inventors and researchers had turned the early theories into working models.Yet it took another thirty years for TV to become industry.
The influence of TV on the life of the people is incalculable: it can influence their thoughts and their way of life.It can also add to their store of knowledge.Educational TV stations offer teaching in various subjects.Some hospitals use TV for medical students to get close-up views of operations.At first television programs were broadcast in black-and-white.With the development of science and technology, the problem of how to telecast them in full color was solved and by the middle 1960s the national networks were broadcasting most of their programs in color.
The programs that people watch are not only local and national ones.Since the launching of the first communications satellite, more and more programs are telecast ‘live’ from all over the world.People in San Francisco were able to watch the 1964 Olympic Games in Tokyo.And live telecasts now come form. outer space.In 1969, the first astronauts to land on the moon televised their historic ‘moon walk’ to viewers on the earth.Since then, astronauts have regularly sent telecast to the earth.
1.The launching of communications satellites make it possible for people in San Francisco to ________.
A.get close-up views of operations
B.watch the 1964 Olympic Games in Tokyo
C.store knowledge
D.watch national programs
2.The development of science and technology made it possible for television programs to ______.
A.be telecast in San Francisco B.be telecast in full color
C.be telecast in Tokyo D.be telecast in black-and-white
3.The word ‘incalculable’ means _____.
A.easy to tell
B.difficult to tell
C.very great
D.very small
4.Television is said to be the modern wonder of electronics, because_____.
A.it influences people’s way of life
B.it brings the world into people’s own home in sight and sound
C.it works as radio
D.it makes people see far
5.Television became an industry in ______.
A.1950
B.the 1950s
C.the 1920s
D.the 1960s
有如下代码段 public class OperatorAndExceptions { public static void main(String args[]) { int i=10，j=15； System.out.println(i==j)； String s1=new String("how are you!")； String s2=new String("how are you!")； System.out.println(s1==s2)； } } 其输出为()。
A．true false
B．true true
C．false true
D．false false
XP is (71) of interesting twists that encourage one to think--for example, how about "Test and then code"？ I've worked with software companies and a few IT organizations in (72) programmer performance was measured on lines of code delivered and testing was measured on defects found-- (73) side was motivated to reduce the number of defects prior to testing. XP uses two types of testing: unit and functional. (74) , the practice for unit testing involves developing the test for the feature prior to writing the code and further states that the tests should be automated. Once the code is written, it is immediately (75) to the test suite bringing instant feedback.
A．filled
B．stuff
C．pack
D．full
在同一可访问区内有如下8个函数：
①double calculate(double x)
②double calculate(double x, double y)；
③double calculate(double x. int y)；
④double calculate(int x, double y)；
⑤double calculate(int x)；
⑥float calculate(float x)；
⑦float calculate(double x)；
⑧float calculate(int x，double y)。
那么关于函数重载的说法中，不正确的是(63)。
A．②③④⑤中任两个函数均构成重载
B．①③构成重载
C．②⑧肯定构成重载，⑥⑦也肯定构成重载
D．④⑧构成重载
莎伦有如下的效用函数:
式中，X是她对棒棒糖的需求量，PX=1美元，Y是她对浓咖啡的需求量，PY=3美元。
(1)推导莎伦对棒棒糖和浓咖啡的需求函数。
(2)假定其收入I为100美元，莎伦会消费多少棒棒糖，多少浓咖啡？
(3)收入的边际效应为多少？
Sharon has the following utility function:
where X is her consumption of candy bars, with price PX= $1, and Y is her consumption of espressos, with PY= $3.
a. Derive Sharon ' s demand for candy bars and espressos.
b. Assume that her income I= $ 100. How many candy bars and how many espressos will Sharon consume？
c. What is the marginal utility of income？
