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【单选题】
采用绝缘铜芯线作保护接地线或保护接零线，最小截面积为（）平方毫米。A.
1.5
B.
2.5
C.
4
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反馈参考答案：
举一反三
【单选题】Why has the NHS approved of the creation of chains of hospitals?
A.
To address the serious economic setbacks facing the hospital.
B.
To improve the medical facilities of the chains of hospitals.
C.
To help more patients receive care from respected institutions.
D.
To provide specialist services for more hospitals to help patients.
【单选题】有关研究表明，3~4岁幼儿的词汇量为1730个，4~5岁幼儿为2853个，5~6岁为3562个，由此结果可看出，（）是幼儿词汇量增长的活跃期。
A.
3~4岁
B.
4~5岁
C.
5~6岁
D.
3~6岁
【单选题】In his______to the Congress, Obama pivoted his administration from focusing on stopping the economic decline to recovery through reinvention.
A.
lecture
B.
speech
C.
address
D.
oration
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