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【单选题】
下列叙述中错误的是______。A.
荧光光谱的最短波长和激发波长的最长波长相对应；
B.
最长的荧光波长与最长的激发光波长相对应；
C.
荧光光谱与激发光波长无关；
D.
荧光波长长于或等于激发光波长。
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反馈参考答案：
举一反三
【单选题】若文件的权限为644,那么下列说法正确的是( )
A.
文件的所有者可读可写,文件属组用户可写,其他用户可写
B.
文件的所有者可读可写,文件属组用户可读,其他用户可读
C.
文件的所有者,属组用户,其他用户都可写
D.
文件的所有者可读可写可执行,属组用户,其他用户可读可执行
【单选题】How does Bruno feel when he hears the news of his inheritance?
A.
excited
B.
sorry
C.
hardly believe
【单选题】—_________? —He’s fat and medium height.
A.
What does he do
B.
How old is he
C.
What does he look like
D.
What is he doing
【单选题】Why does Bruno lie when Shmuel is caught eating in Bruno’s house?
A.
He wants to play a prank on Shmuel.
B.
He does not want Shmuel to appear in his house.
C.
He wants to see how hungry Shmuel is.
D.
He was frightened by Lieutenant Kotler.
【单选题】_____ is he? He's _____ . [ ]
A.
How old; young
B.
How; fine
C.
What; tall
D.
Who; fat
【单选题】土压盾构中泥土压调节方法是通过调节推进油缸的推进速率或螺旋输送器的转速进行控制。土压通过( )推进油缸的推进速率或( )螺旋输送机的转数来减小。
A.
增大、减小
B.
增大、增大
C.
减小、增大
D.
减小、减小
【单选题】土压盾构中泥土压调节方法是通过调节推进油缸的推进速率或螺旋输送器的转速进行控制。土压通过（ ）推进油缸的推进速率或（ ）螺旋输送机的转数来增大。
A.
增大、减小
B.
增大、增大
C.
减小、增大
D.
减小、减小
【简答题】已知a=7,执行以下表达式后,a的值是多少? a++
【单选题】How does Bruno’s father explain his new job?
A.
To train the farmers into qualified farmhands.
B.
To transform the farmers into better humans.
C.
To make everything better for everyone.
D.
To guard the work camp.
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