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【判断题】
when we have recorded student performance we will want to give feedback to the classA.
正确
B.
错误
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举一反三
【判断题】Paving meansa surface of flat stones or material like stone on the ground, which is only used in urban space.
A.
正确
B.
错误
【单选题】( ) is material like a net made from wire, thread, or plastic.
A.
net
B.
Mesh
C.
network
D.
internet
【单选题】A key difference between a thermoplastic polymer and an elastomeric material like rubber is that ______.
A.
rubber has a relatively small number of covalent crosslinks and thermoplastic polymers have none
B.
thermoplastics don't melt when heated but rubbers do
C.
rubber can be subjected to extensive plastic deformation whereas typical thermoplastics have little plasticity
D.
all of the above
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