根据题意得：x-5≥0，
解得x≥5．
故答案为：x≥5．
The water ______ cool when I joined into the pool for morning exercise. [ ]
A. was felt
B. is felt
C. feels
D. felt
对零件、紧固件表面和孔的表面进行除油，除过油的零件只允许存放（）。
A.4h
B.8h
C.10h
D.12h
