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【判断题】
任一热力循环的热效率( 回热循环 )都可以用公式 η t =1-T 2 /T 1 计算。
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】下面哪个是非法的:
A.
int I = 32;
B.
float f = 45.0;
C.
double d = 45.0;
D.
char c = ‘u’;
【单选题】下面哪个是非法的?
A.
int I = 32;
B.
float f = 45、0;
C.
double d = 45、0;
D.
char c = ‘u;//符号错误
【单选题】下面哪个是非法的()
A.
int i = 32;
B.
float f = 45.0;
C.
double d = 45.0;
D.
char c = ‘u’;
【简答题】A farmer(农民) sits near a tree. He is tired. A rabbit is running fast. It cannot see the tree. It hits the tree and dies(死). The farmer has the rabbit. He's lucky. He wants to have many rabbits. He doe...
【单选题】地层对称重复,中间老,两边新,地层界线平行延伸,表示该地区存在
A.
水平背斜
B.
水平向斜
C.
倾伏背斜
D.
伏向倾斜
【简答题】The more he tired to help her, (little) ______ she seemed to appreciate it.
【单选题】下面哪个是非法的:
A.
int I = 32;
B.
float f = 45.0;
C.
double d = 45.0;
D.
char c = ‘u’; //符号错
【单选题】The manager forced him ____ more though he was tired.
A.
do
B.
doing
C.
done
D.
to do
【简答题】A.Bob is too tired to study any more. B.He told Bob not to study late at night. C.Bob didn't hear the alarm. D.He had often advised Bob to study.
【单选题】地层对称重复,中间新,两边老,地层界线平行延伸,表示该地区存在 ( ) 。
A.
水平背斜
B.
水平向斜
C.
倾伏背斜
D.
倾伏向斜
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