题目内容
挖掘机在升降旧段时，必须检查好旧段的规格。在升降过程中要找好方向打好掩。()
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Which of the following statements about language is NOT true？
According to Saussure,______refers to the real utterances produced by real people in real
The study of the sound patterns and sound systems of languages is called______.
在相对湿度为56％时，水不溶性药物A与B的吸湿量分别为2g和3g，A、B混合后不发生反应，则混合物的吸湿量为()
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