听力原文: It is difficult to give an accurate definition of "temperature", but we can try. Temperature is not the total amount of heat in a thing but the intensity of its heat at a certain time. When we measure temperature we do not measure the quantity of heat but its intensity. A large pan of boiling water obviously contains more heat than a smaller pan of boiling water, but their temperatures arc the same. The water in both pans has a temperature of 100 degrees Celsius.
To measure temperature accurately we need good instruments. The accuracy of a measurement depends partly on the instrument, which is used. Most instruments used to measure temperature are called thermometers. In measure thermometers two scales are used, the Fahrenheit scale and the Celsius scale. American doctors find the Fahrenheit scale convenient for measuring the temperature of the body, but other doctors and scientists often use the Celsius scale. The boiling points of water are different on the two scales. On the Celsius scale, water boils at 100 degrees. On the Fahrenheit scale it boils at 212 degrees.
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A.Temperature is the total amount of heat in a thing at a certain time.
B.Temperature is the intensity of heat in a thing at a certain time.
C.Temperature is the quantity of heat in a thing at a certain time.
D.We can hardly give a definition of "temperature."
第1题
下列选项中不会引起二义性的宏定义是()。
A.#define S(x) x*x
B.#define S(x) (x)*(x)
C.#define S(x) (x*x)
D.#define S(x) ((x)*(x))
第2题
下列选项中不会引起二义性的宏定义是()。
A.defineS(x)x*x
B.defineS(x)(x)*(x)
C.defineS(x)(x*x)
D.defineS(x)((x)*(x))
第3题
A.#defineS(x)x*x
B.#defineS(x)(x)*(x)
C.#defineS(x)(x*x)
D.#defineS(x)((x)*(x))
第4题
下面宏定义正确的是()
A.#define S a*b
B.#define PI 3.14;
C.#define max(a,b) ((a) >(b) ?(a) ;(b) )
D.#define s(x) (x)*(x);
第5题
A.#defineS(x)x*x
B.#defineS(x)(x)*(x)
C.#defineS(x)(x)*x
D.#defineS(x)(x*x)
第6题
下列定义中,不正确的有______。
A.#define PI 3.141592
B.#define S 345;
C.int max(x,y);
D.static char c; int x,y; { ...... }
第7题
下列定义不正确的有______。
A.#define PI 3.141592
B.#define S 345;
C.int max(x, y); int x,y; {}
D.int max(int,int);
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