题目: 某学校152名学生,8:50~9:00课间餐,大约3h后,78人发生了恶心,剧烈反复的呕吐,同时伴有上腹部的疼痛,腹泻次数少,体温不高。若要证实食物中毒的诊断,关键是要得到患者的何种资料()。A.病史B.用餐情况C.病人症状D.病人体征E.病人呕吐物实验室检查结果 答案: 参考答案:E
题型:选择题 下列说法正确的是[ ]A.摩尔是一种国际基本物理量 B.标准状况下气体的摩尔体积约为22.4 L C.1 mol氧的质量为32 gD.在同温同压下,相同体积的任何气体单质所含分子数相同 查看答案
题型:选择题 — Sam hasn't come yet. — He likes to watch football match, ______? So I'm sure he'll come. [ ]A. doesn't heB. does he C. isn't he D. is he 查看答案
题型:选择题 The twins are so much alike that no one can ________one from the other.A.distinguishB.separateC.identifyD.recognize 查看答案