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【单选题】
额定工作状态下, 220V , 60W 的白炽灯的电阻是 220V , 15W 的白炽灯的()。A.
2 倍
B.
1/4
C.
4 倍
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反馈参考答案：
举一反三
【单选题】Prior to 1975, union efforts to organize public-sector clerical workers, most of whom are women, were some- what limited. The factors favoring unionization drives seem to have been either the presence...
A.
professionals
B.
managers
C.
clerical workers
D.
service workers
E.
blue-collar workers
【单选题】利用PubMed主题途径加权检索“肺肿瘤的治疗”正确的检索策略是( )
A.
Lung Neoplasms/therapy [Mesh]
B.
Lung Neoplasms AND therapy
C.
Lung Neoplasms/therapy [Majr]
D.
Lung Neoplasms AND therapy[TI]
【单选题】——How about calling on many _____ volunteer to help those trapped in Yushu county? ——I can't think of ________ better idea.
A.
a ; /
B.
/, a
C.
a ; a
D.
/; /
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