【单选题】—What are Mary and Joe doing? —They ____ newspapers. [ ]
【单选题】以总体各单位数值之和除以总体单位总数,所得就是()。
【判断题】( )代料栽培适合食用菌生长的含水量通常是在60%~65%左右。
【单选题】用总体中各单位某一数量标志值之和除以总体单位总数,这是()。
【单选题】As she______the newspaper, Granny______asleep.
B.
was reading.., was falling
【单选题】Mary has so many interesting books________. [ ]
【判断题】平均数:总体各单位数值之和除以总体各单位数目所得之商。
【单选题】以总体各单位数值之和除以总体单位总数的商,即是______
【简答题】The library is open every day except Sunday from half past eight in the morning till five in the afternoon.
【简答题】Fill in each blank with the noun of the adjective as given in the first sentence. The library is a completely silent place. The library is a place of complete _____.