液体的可压缩性
参考答案：
液体受压力作用而体积缩小的性质。
32. ---I can’t see words on the blackboard clearly .
---Why, your eyes need _____ .Perhaps you need ______ glasses .
A．to examine; wear
B．to examine; to wear
C．to be examined; to wear
D．examining ; wearing
投保人变更受益人时须经被保险人同意。( )
