单词拼写(共10小题；每小题1分，满分10分)

小题1:The continue      (保持)in touch with each other by e-mail.

小题2:His memory is very       (精确的); he never makes mistakes.

小题3:Bill was doing a lot of exercise to build up his     (力量).

小题4:Children should be told not to follow     (陌生人).

小题5:If you tell lies, it is you who will     (受痛苦)in the end.

小题6:Several years ago her husband died     (突然地)at the age of 64.

小题7:The heavy snow did great     (损害)to the fruit trees.

小题8:The     （含量)of milk fat is not less than 8.5 percent.

小题9:The moving snake     (吓坏) the little girl just now.

小题10:He       (劝告) that Tom and I buy the new tire.

静态工作点的位置对放大器的工作有什么影响？应该怎样选择静态工作点？