如图，已知正方形ABCD面积，O为BC上一点，P为AO的中点，Q为DO上一点，则能确定△PQD面积。
(1)O为BC的三等分点(2)Q为DO的三等分点。(2)Q为DO的三等分点
设数列满足{an}满足a1=0，an+1-2an=1,则a100=（）
Thistest________anumberofmultiplechoicequestions.
Weaimtoensurethatallcandidatesaretreatedfairlyandthattheyhaveequal______toemploymentopportunities．
Allherhardwork__________intheend，andshefinallypassedtheexam．
