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【单选题】
下列电器中能实现欠压保护的是A.
熔断器
B.
速度继电器
C.
接触器
D.
行程开关
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】用力摁住伤口
【简答题】According to mechanism the polymerization can be classified into ______ and ______.
【单选题】国家机关、军队、社会团体、企业事业组织、居民委员会、村民委员会,应当()本单位或者本居住区的适龄公民参加献血
A.
宣传和教育
B.
动员和组织
C.
教育和引导
D.
宣传和发动
【单选题】In the United States, someone is classified as unemployed if he or she
A.
does not have a job.
B.
does not have a job, or else has a job but is looking for a different one while continuing to work.
C.
does not have a job, has recently looked for work, and is collecting unemployment insurance.
D.
does not have a job, and is collecting unemployment insurance.
E.
none of the above
【单选题】In the United States, someone is classified as unemployed if he or she
A.
does not have a job.
B.
does not have a job, or else has a job but is looking for a different one while continuing to work.
C.
does not have a job, has recently looked for work, and is collecting unemployment insurance.
D.
does not have a job, and is collecting unemployment insurance.
E.
none of the above
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