A-A+
As the pressure ______ the accumulated snow is turned into ice crystal.（1991年考试真题）A．
问题详情
As the pressure ______, the accumulated snow is turned into ice crystal.（1991年考试真题）
A．intensifies
B．magnifies
C．heightens
D．purifies
请帮忙给出正确答案和分析，谢谢！
考点：
