抽风机的停止操作？
参考答案：（1）关泵入口阀门。
（2）停风机。
（3）待风机停止转动，关出口阀门。
单词拼写（共5小题，计5分）阅读下列各句，根据所给首字母在各题横线上写出所缺单词，使各句语义完整和正确。
小题1:Mr. White is a teacher. He works in a middle s________.
小题2:I g________ up at haft past six every morning.
小题3:In Changsha it's very hot in summer and very c________ in winter.
小题4:I could look a________ myself well when I was ten.
小题5:Please keep your eyes closed. Don't o________ them until I say "OK".
SPA与免疫球蛋白有较强亲和力的部位是（）。
A.Fab段
B.Fc段
C.F（ab’）2段
D.重链
E.轻链
