在制备细胞膜时先要制备红细胞稀释液，下列关于制备红细胞稀释液的做法正确的是（　　）

正月十六，是每年一度的“安阳桥庙会”。某校九年级同学开展了“庙会民俗文化”社会调查活动。下面是同学们调查收集的两则原始材料。
材料一：随着历史的变迁，原来庙会上众多的民间艺术，如评书、大鼓、拉洋片、木偶戏、跑马上杆杂技、武高跷等表演逐渐退去，但是增加了电视广播、文艺演出、特异表演、政策咨询等现代形式，还保留了捏面人、吹糖稀、花灯、泥哨、泥咕咕等民间传统工艺品。
材料二：庙会结束后，北关区环卫处共出动300余名环卫工人、3辆铲车、5辆垃圾清运车进行道路清扫和垃圾清运。经过3个小时的艰苦奋战，环卫工人共清理各类垃圾100余吨。
请你参与活动并完善下面的调查任务：

动词填空 用括号内所给动词的适当形式填空。
⑴Mom makes me eat an apple a day ____  (keep) the doctor away.
⑵She spent as much time as she could ____  (explain) it to us, but we still didn’t believe her.
⑶I was told that some students in Grade Seven and Eight ____  (take) part in an English camp in
Australia the next month.
⑷I remember his brother ____  always ____ (ask) questions in class when he was at the primary school.
⑸The various fantastic drawings the famous artist devoted himself to ____  (show) in our school hall the day before yesterday.
⑹The girl sitting next to me on the plane was nervous, for she____  never ____  (fly) before.
⑺The number of deaths from heart disease____  (reduce) greatly if people eat more fruits and vegetables.
⑻“So Young”, a new movie directed by Zhao Wei, ____ (earn) about 600 million yuan in the last few weeks.

“博我以文”一句中“博”的活用方式是____。