以下哪些不是瘀血停滞型胃痛的主要特点()
A.痛如针刺、刀割,痛有定处
B.疼痛持久,按之痛甚
C.口苦口干,烦躁易怒
D.食后加剧,入夜尤甚
E.舌红少苔,脉细数
参考答案:C, E
6月26日是国际禁毒日,吗啡(化学式为C17H19NO3)是我国政府严禁的毒品.吗啡由______ 种元素组成,分子内共有______个原子,其相对分子质量为______,含碳的质量分数为______.
WWW is a large network of Internet servers providing ______ and other services to terminals running client applications such as a browser.
A.modem B.compressionC.hypertext D.encode