题目内容
水泥混凝土是一种弹性材料。( )
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No matter how much they receive in the end, people are willing to try their luck.
The enviroment benefits, as it cuts down on the use of physical red envelopes.
To activate the hongbao, you need to spend it on something first.
This hongbao, however, can only by used to purchase an airplane from boeing.
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