Where is the pen? I'm looking for it ________.
A:somewhere
B:everywhere
C:nowhere
D:anywhere
A: How ____ are you, Tom?
B: I am 75 kilograms.
火箭发射时,高温的火焰向下喷射,大量的“白气”从发射台底部的大水池中涌出.这些“白气”的产生伴随着的物态变化是( )