橡胶在较高温度(110℃以上)下塑炼时,其塑性的增加主要靠()作用。
参考答案:氧化裂解
混凝土试块试压后,某组三个试块的强度分别为26.5MpA.32.5MpA.37.9Mpa,该组试块的混凝土强度代表值为()。
A、26.5MPa
B、32.3MPa
C、32.5MPa
D、不作为强度评定的依据
When he got the news, he was ______ frightened ______ his leg couldn't move.[ ]
A. so, that
B. very, that
C. too, that
D. too, to