看图，读一读，将字母序号写在横线上。

A. I like this plant. It's short. It has small leaves. It has three red flowers.

B. This is my plant. It's small. It has two small leaves. I water it every day.

C. There are two seeds. They are under the ground. They drink the rain water.

D. I have a new plant. It's green. It has long leaves. It has small flowers too.

①必须加强国际合作②意识形态不同的国家难以合作③互不侵犯，和平共处④和平来之不易，悲剧不能重演

对于给定的任意实数x，y，z（z≠0且z≠6），记xOy平面上点P（x，y）到三点A（z，z）、B（6﹣z，z﹣6）、C（0，0）的三个距离中的最大值为g（x，y，z），则g（x，y，z）的最小值是____ 

甲、乙、丙三名射击运动员在某场测试中各射击20次，3人的测试成绩如下表，则甲、乙、丙3名运动员测试成绩最稳定的是（）