根据答句写问句。

1.                                                        ？

     I went swimming on my holiday.

2.                                                        ？  

     I read a book yesterday.    

3.                                                        ？

     Sarah went to Beijing by train.  

4.                                                        ？

      I am 160 cm tall.    

5.                                                        ？

      Yes, I went to the library yesterday.

出粉率一定，小麦的总质量和面粉的质量成______比例关系．圆柱体积一定，圆柱的底面积和高成______比例关系．