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目前二次成型技术主要包括:中空吹塑成型、薄膜的双向拉伸、热成型以及合成纤维的拉伸;二次成型中,高分子材料最主要的形变是高弹形变。A.
正确
B.
错误
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【简答题】原码的编码规则是:最高位代表 ,其余各位是该数的 。
【单选题】When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.
A.
why it is
B.
what it does
C.
why it does
D.
what it is
【单选题】Formation of solutions where the process is endothermic can be spontaneous provided that __________.
A.
they are accompanied by another process that is exothermic
B.
they are accompanied by an increase in order
C.
they are accompanied by an increase in disorder
D.
the solvent is a gas and the solute is a solid
E.
the solvent is water and the solute is a gas
【单选题】Combustible material stored in a compartment adjacent to a compartment where there is a fire may be ignitedThis ignition can occur by _____.
A.
heat convection through the adjacent bulkheads
B.
combustion gases carried through the ventilation system
C.
direct convection of the heat emitted by the adjacent fire
D.
heat radiated from the dock or bulkhead by the adjacent fire
【单选题】听力原文：I try to eat less when I am on a tight schedule. (A) Yes, I saw that too on a diet program. (B) I also get drowsy if I have a big meal. (C) The restaurant is so crowded whenever I go there. (6)
A.
B.
C.
【单选题】When I try to understand ________ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.
A.
why it does
B.
what it does
C.
what it is
D.
why it is
【简答题】原码的编码规则是:最高位代表_______,其余各位是该数的尾数本身。
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