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【单选题】
电子能级间隔越大,跃迁时吸收光子的( )。A.
波长越长
B.
波数越大
C.
能量越小
D.
频率越低
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知识点：
皮皮学刷刷变学霸
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;//符号错误
【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...
【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.
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