题目内容
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Butyl rubber (IIR) has little resistance to gas permeating.
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更多“Butyl rubber （IIR) has little …”相关的问题
A.系统的单位冲激响应h(n)是无限长的
B.结构必是递归型的
C.肯定是稳定的
D.系统函数H(z)在有限z平面（0＜|z|＜∞）上有极点
Which of the following materials would exhibit the property of syneresis()
A．impression compound
B．silicon rubber
C．reversible hydrocolloid
D．polyether rubber
A．addition silicone rubber
B．agar
C．alginate
D．condensation silicone rubber
Impression material with least tear resistance()
A．addition silicone rubber
B．alginate
C．agar
D．polyether
The author compares cells with water balloons in order to ______.
A．make you think of summer
B．help you visualize the cells
C．show how rubber is elastic
D．show how many shapes cells can have
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