Hi , I’m tina . This is a photo of Class 18 . This class has twenty-five students ,twelve girls and thirteen boys . These are Amy and Bob . Amy is Bob’s sister . Amy is 12 and Bob is 13 . Amy likes English and math . Bob likes music . He has a CD collection . This is Bruce . He is 14 . He likes sports and he has a sports colletion . Jerry is a teacher . He is thirty-four years old . He likes blue ,black and green . Many of his clothes are in these colors . Do you know the relationship between Jerry and Bruce ? Aha ! Jerry is Bruce’s uncle . And you can call him at 0543-3617625 .

根据短文内容从A、B、C、D四个选项中选出正确的答案。

小题1:____ girls are in Class 18 .

A．12

B．13

C．24

D．25小题2:Bruce likes ______

A．sports

B．English

C．music

D．white小题3:The word “relationship” means_____ .

A．关系

B．性别

C．爱好

D．差异小题4: ____ and Bob are in a family .

A．Jerry

B．Amy

C．Bruce

D．Tina小题5: Jerry’s _______ is 0543-3617625 .

A．card number

B．telephone number .

C．bus number

D．schoolcard number

     小明同学因为饲喂观赏小鸟而喂养黄粉虫。黄粉虫原是粮仓中的害虫，发育过程类似于菜粉蝶。

     小明是一个善观察、爱动脑、勤洗手的同学。他在饲养中发现，铺在养虫盒子里的泡沫塑料上有细小的噬咬痕迹。是黄粉虫在吃塑料吗？于是，他把黄粉虫分为对照组和实验组，对照组只喂麦麸和菜叶，实验组加喂塑料餐盒片。结果虫子确实在吃塑料盒。

     他又对实验组的粪便做了静电、燃烧、浸水等实验，发现其粪便不产生静电吸附、不可燃烧、不漂浮，并产生腐败臭味。

（1）你认为蝗虫的发育过程属于_____________。

（2）黄粉虫应属于_________；请写出其中的食物链：___________________________。

（3）实验的“假设”和“控制的变量”分别是________________、________________。

（4）根据上述实验结果，请你写出相关的结论：                                                 。