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原子吸收分光光度计接通电源后,空心阴极灯亮,但高压开启后无能量显示,可通过( )方法排除
A.
更换空心阴极灯的
B.
将灯的极性接正确
C.
找准波长
D.
将增益开到最大进行检查
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参考答案：
举一反三
【单选题】Many students didn’t realize the importance of study________they left school.
A.
when
B.
until
C.
as
查看完整题目与答案
【判断题】如果细分市场上竟争者众多且竞争者实力强大,企业可以采用不断推出新产品和投人资金来攻守该细分市场.在这个细分市场上获得竟争优势。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】Not once _________ his view of life.A. did Mr. Smith mention B. Mr. Smith mentioned that C. Mr. Smith mentioned D. would Mr. Smith mention
查看完整题目与答案
【单选题】Despu és de depositar un ramo de flores en la tumba de mi abuela, hice, según la costumbre, varias reverencias en se ñ al de respeto y homenaje a su memoria. 选出此句中depositar的含义
A.
Fundar o crear esperanzas, ilusiones, confianza
B.
Dejar, colocar o poner a una persona o cosa en un lugar
C.
Encerrar, contener una cosa algo.
D.
Poner bienes bajo la custodia o guarda de una persona, entidad o institución que responda de ellos
查看完整题目与答案
【单选题】Not once to Michael that he could one day become a top sutdent in his class.
A.
occurred it
B.
it did occurred
C.
it occurred
D.
did it occur
查看完整题目与答案
【单选题】Not until some students failed in the exam _____ how much time they had wasted.
A.
didn’t they realize
B.
did they realize
C.
they didn’t realize
D.
they realize
查看完整题目与答案
【简答题】Many students didn’t realize the importance of study_____ they left school. （when/until）A. until
查看完整题目与答案
【单选题】Not once ______ his view of life.
A.
did the gentleman mention
B.
the gentleman mentioned that
C.
the gentleman mentioned
D.
does gentleman mentioned
查看完整题目与答案
【单选题】Not once ______ his view of life.
A.
did the gentleman mention
B.
the gentleman mentioned that
C.
the gentleman mentioned
D.
do the gentleman mention
查看完整题目与答案
【判断题】The writer’s friend does not abandon his green principles even only for once.
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】Many students didn’t realize the importance of study________they left school.
A.
when
B.
until
C.
as
查看完整题目与答案
【判断题】如果细分市场上竟争者众多且竞争者实力强大,企业可以采用不断推出新产品和投人资金来攻守该细分市场.在这个细分市场上获得竟争优势。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】Not once _________ his view of life.A. did Mr. Smith mention B. Mr. Smith mentioned that C. Mr. Smith mentioned D. would Mr. Smith mention
查看完整题目与答案
【单选题】Despu és de depositar un ramo de flores en la tumba de mi abuela, hice, según la costumbre, varias reverencias en se ñ al de respeto y homenaje a su memoria. 选出此句中depositar的含义
A.
Fundar o crear esperanzas, ilusiones, confianza
B.
Dejar, colocar o poner a una persona o cosa en un lugar
C.
Encerrar, contener una cosa algo.
D.
Poner bienes bajo la custodia o guarda de una persona, entidad o institución que responda de ellos
查看完整题目与答案
【单选题】Not once to Michael that he could one day become a top sutdent in his class.
A.
occurred it
B.
it did occurred
C.
it occurred
D.
did it occur
查看完整题目与答案
【单选题】Not until some students failed in the exam _____ how much time they had wasted.
A.
didn’t they realize
B.
did they realize
C.
they didn’t realize
D.
they realize
查看完整题目与答案
【简答题】Many students didn’t realize the importance of study_____ they left school. （when/until）A. until
查看完整题目与答案
【单选题】Not once ______ his view of life.
A.
did the gentleman mention
B.
the gentleman mentioned that
C.
the gentleman mentioned
D.
does gentleman mentioned
查看完整题目与答案
【单选题】Not once ______ his view of life.
A.
did the gentleman mention
B.
the gentleman mentioned that
C.
the gentleman mentioned
D.
do the gentleman mention
查看完整题目与答案
【判断题】The writer’s friend does not abandon his green principles even only for once.
A.
正确
B.
错误
查看完整题目与答案
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