【单选题】Why would anyone want to set aside a day to honor a lowly little groundhog? The answer to that question is not certain, but a group of people get together every February 2 in Punxsutawney, Pennsylvani...
A.
He's cute and playful, and children love to watch him.
B.
He's looking for food and the people want to help him find it in the snow.
C.
Many people believe him to be a harbinger of spring.
D.
The people want to be sure he is alive after such a long winter.
【单选题】Could you show me ________ ? A. how can I get to the station B. where is the station C. how could I get to the station D. how I can reach the station
【多选题】要查找某主题文献,可先利用二次文献信息查找文献和文献线索,并进而根据文献线索获取一次文献全文,以下哪些不属于二次文献信息源?
【判断题】雷诺数(Reynolds)数表示粘性力与惯性力之比
【单选题】雷诺(Reynolds)五联征是以下哪种疾病的典型特征( )