B8018单机柜最大支持（）载频？
E、8
F、12
G、18
H、20
参考答案：C
已知冰的密度为0.9×103kg/m3，一块体积为80cm3的冰全部熔化成水后，水的质量是_________g，水的体积是_________cm3。
Mr Brown had lain ____ the ground ____ four hours before they finally found him. [ ]
A. on; for
B. at; in
C. on; after
D. in; during
