红领巾十分珍贵。党把它授给每个少先队员，要求他们以实际行动珍惜（）的荣誉，时刻准备为它增添光彩。

A.国旗一角

B.红旗一角

C.队旗一角

D.党旗一角

Water can absorb and give off a lot of heat without big changes in temperature, thus creating a  _____

environment.  [ ]

A. peaceful

B. sensitive

C. common

D. stable