Which of the following does the passage mainly discuss? Which of the following will cause density within the glacier to increa

admin2004-11-30 112

问题 Which of the following does the passage mainly discuss?
Which of the following will cause density within the glacier to increase?

选项 A、Increased water and air content
B、Pressure from the weight of new snow
C、Long periods of darkness and temperature variations
D、Movement of the glacier