【简答题】Anna spent the weekend visiting car dealerships ________ she needs a new car.
【判断题】Anna Quindlen spent her childhood in a lovely and beautiful place which she enjoyed and loved very much!
【简答题】给水排水塑料管材的管道规格用( )表示。A. DN公称直径 B. C. D. B. D外径×壁厚 C. d管道内径 D. dn外径
【单选题】武汉大学历史系的()先生著有《魏晋南北朝史论》。