【单选题】在重庆维普数据库中,要检索关键词(k)中为“高等教育”且机构(j)为“北京大学”的检索表达式为( )。
A.
( 关键词 = 高等教育 )*( 机构 = 北京大学 )
B.
( K= 高等教育 )*(J= 北京大学 )
C.
关键词 = 高等教育 * 机构 = 北京大学
【简答题】翻译下列句子,注意运用词类转换法。 1.I had the fortune to meet him. 2 She is a lover of Chinese literature. 3.We should never be content with a little book knowledge. 4 She is against smoking and drinking. 5 The Great...
【单选题】What colour’s your briefcase? ________ black or brown?
【判断题】地面上一点到大地水准面的铅垂距离称为高程。
【简答题】I had the fortune to meet you.
【多选题】地面上一点到大地水准面的铅垂距离为( )
【简答题】I had the fortune to meet him.
【简答题】半导体二极管加反向偏置电压时,反向饱和电流越小,说明二极管的()性能越好。