【单选题】Does Ben love American football?
【单选题】Does Ben ________ books?
【单选题】What does the woman mean?
A.
Ben will come to the party.
B.
He is at a conference tomorrow.
C.
Ben is unable to come to the party.
【简答题】电光材料最重要的应用是制作电光快门,它的原理是什么?
【简答题】《中国药典》(2010年版)凡例中,贮藏项下规定的“密闭”系指
【单选题】What does Ben's father often do _____ Sundays? [ ]