下图所示的四幅图片，下列说法正确的是

下列实例中属于竞争的是(　　)    

人工合成的植物激素类似物常用于生产实践．某课题组研究了激素类似物甲和激素类似物乙对微型月季生根和侧芽生长的影响，请回答下列问题：

（1）由图1得出的初步结论是：____ 激素类似物乙对微型月季插条生根的影响是____ ．

（2）由图1的结果____ （填“能”或“不能”）判断0.5μmol/L的激素类似物乙对生根的影响．为探究3 μmol/L的激素类似物甲和0.5μmol/L的激素类似物乙对微型月季插条生根的复合影响，应设计____ 种培养基．

（3）已知甲为生长素类似物，图2为其X、Y和Z三种浓度下对微型月季茎段侧芽生长的影响，则：①X浓度的甲对微型月季茎段侧芽生长具有____ 作用．

②X浓度、Y浓度和Z浓度之间大小的关系是____ ． 

完形填空
   Dodtors tell us that we should have a 1 from work for a week or two weeks
every year. If it is possible, they say, we should2 our homes and go to another3 of the country. We should go away for4 Then, after the holidays, we will be5and get ready for6 again.
   But some people do not want to leave their homes and 7 in other places. They think their  8  are best of all. And some people can have a rest in 9way. They can go to visit their friends. They can have a 10holiday together.