从上图可以看出，人口增长模式转变的发展进程表现为：首先是____率下降，其次是____率下降，最后导致____率的下降。

在甲、乙、丙三个培养皿中分别放入等量的面巾纸，在面巾纸的上面都放25粒绿豆种子，然后将它们放在不同条件下进行培养，数日后记录种子萌发的情况如表．

据表分析可知，该实验的实验变量是（　　）

    Champion Swim Club ____(found) in 2006 by former World Cup Swimming Champion Ms. Vivian Wang and is the first competitive organization for expats' children and adults in Shanghai. The club ____(provide) a structured program focused on the long-term development of its swimmers. Members will be assessed and given the opportunity____(train) with swimmers of a similar standard and level under the supervision of ____(lead) internationally experienced swimming coaches.

    So far, we____(create) a program that caters to swimmers of all ages and abilities. In addition to ensuring proper technique and conditioning, Swimmers____(place) in groups by the coaching staff after a stroke technique assessment session. The program has been designed by a world class coaching team that focuses on all of the elements and techniques that will result students maximizing their potential to enjoy and____(compete) at a competitive level.

    The coaching team comprises former World Cup Swimming Champion Vivian Wang as Head Coach and a number of highly experienced professional coaches will work together____(provide) a developmental swimming program where there is avenue for advancement through to higher levels. The leader of the club said, “I think we____(do) some useful things. If everyone spread the spirit, there ____(be) more champions in China. ”