本题考察均匀分布的方差。由5题提示，，所以，故填写6．
Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
The Japanese celebrate the “Tanabata Festival”every 7th night of July, believing that this could improve their （ ） skills. (dress, make)<
，所以
，
故填写6．
，所以，故填写6．