A. HF、HCl、HBr、HI的热稳定性依次减弱
B. 金刚石的硬度大于硅,其熔、沸点也高于硅
C. NaF、NaCl、NaBr、NaI的熔点依次降低
D. F2、Cl2、Br2、I2的熔、沸点逐渐升高
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