似：sì ____  shì ____

得：dé ____ děi ____de ____     

根据句意，用括号内所给单词的正确形式填空。（一空一词）

1.They are organizing the____  (thirty-nine) sports meeting of their school.

2.The house____ (it) is very beautiful, but the river near it is much polluted.

3.The boy's dad was ____ (complete ) shocked when he saw that his son was playing with fire.

4.The news and talk shows may not be very exciting, but we can expect ____  (learn) a lot from them.

5.My grandfather's sunny character has a great ____ (influent) on me in my life.

如图所示，在倾角为α的传送带上有质量均为m的三个木块1、2，3，中间均用原长为L，劲度系数为k的轻弹簧连接起来，木块与传送带间的动摩擦因数均为μ，其中木块1被与传送带平行的细线拉住，传送带按图示方向匀速运行，三个木块处于平衡状态．下列结论正确的是（   ）