消渴病，胃热炽盛证最突出的症状是：
A．心、脾、肾B．肝、肺、肾C．肺、肝、脾D．肺、脾、肾E．肝、脾、肾
参考答案：B
下列物质中，既含有共价键又含有离子键的是
A．NaOH
B．NaCl
C．Na2O
D．HCl
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