A.He laughed with the dog in his arms. B.He picked up the dog by the tips of its ears. C.He sat in a chair with the dog dangling beside him. D.He made people laugh by kissing the dog's ears.
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举一反三
【简答题】are such high compressed gases and as such they combine valuable properties of both liquid and gas.
【判断题】Compressed gases will resume their original shape when released; Compressed gases produce heatbecause of molecular friction; The smaller the volume, the higher the pressure.
【单选题】__________ transport is the transportation of goods through a pipe. Most commonly, liquid and gases are sent, but pneumatic tubes that transport solid capsules using compressed air are also used.