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【多选题】
(多选)下列哪些做法可以保护自己远离新型冠状病毒肺炎传染( )。
A.
减少到人群密集场所活动
B.
均衡饮食,适量运动,作息规律
C.
保持居住环境清洁通风
D.
外出活动务必佩戴口罩
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举一反三
【单选题】Why does Jessie want to change her hair style?
A.
She has found a job.
B.
She has become a teacher.
C.
Her boss is dissatisfied with her hairstyle.
D.
All of the above.
【单选题】Rebecca found life on Everest is hard because ______.
A.
she has nothing but a toothbrush
B.
she is a clean person
C.
everything that is needed has to be carded on the back
【判断题】DSB-SC与常规AM信号频谱的最主要区别在于:DSB-SC信号频谱在载波频率处没有离散冲激分量
A.
正确
B.
错误
【判断题】DSB-SC与常规AM信号频谱的最主要区别在于:DSB-SC信号频谱在载波频率处没有离散冲激分量。
A.
正确
B.
错误
【单选题】Has the woman found her glasses?
A.
Yes, she has.
B.
Yes, she has found it by the telephone.
C.
No, she hasn't.
【单选题】Rebecca found life on Everest is hard because ______.
A.
she has nothing but a toothbrush
B.
she is a clean person
C.
everything that is needed has to be carried on the back
【单选题】三相功率实际上是( )个瓦特表组成的。
A.
1
B.
2
C.
3
D.
2或3
【简答题】A.She is expecting her turn. B.She has found valuable information. C.She needs another week to prepare. D.She has not prepared yet.
【简答题】A.She has already found her topic. B.She won't sleep tonight so as to figure out her topic. C.She is going to have a sound sleep tonight. D.She will think about her essay tomorrow.
【单选题】三相功率表实际上是( )个瓦特表组成的。
A.
1
B.
2
C.
3
D.
2或3
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