皮皮学，免费搜题
登录
搜题
【单选题】
什么是患病率？A.
患病率是指某特定地点内总人口中某种疾病新旧病例之和所占的比例。
B.
患病率是指某特定时间内总人口中某种疾病新旧病例之和所占的比例。
C.
患病率是指某特定时间内总人口中特定疾病新旧病例之和所占的比例。
D.
患病率是指某些的时间内总人口中某种疾病新旧病例之和所占的比例。
E.
患病率是指某特定时间内总人口中某种疾病新旧病例之差所占的比例。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】One day Mrs. Perry said to her husband, “Jack, I’m going to a ladies’ luncheon( 午宴 ) . I know you won’t cook. So I’ll leave you some food for your lunch. Is that all right?” “Oh, yes.” her husband ans...
【简答题】Passage 3 I watched from a distance as the homeless man quarreled with those who did not leave money for him – the majority. I walked up to him and right on queue he asked me for a quarter. “I’ll give...
【单选题】---Bob! Would you please ask all your classmates_______ before Miss Li back? ---OK. I’ll take them right away.
A.
not to leave; will come
B.
not to leave; comes
C.
even; improve
D.
very;improve
【简答题】I watched from a distance as the homeless man quarreled with those who did not leave money for him – the majority. I walked up to him and right on queue he asked me for a quarter. “I’ll give you a qua...
【单选题】---Bob! Would you please ask all your classmates_______ before Miss Li_______ back? ---OK. I’ll take them right away.
A.
not to leave; will come
B.
not to leave; comes
C.
don’t leave; comes
D.
don’t leave; will come
相关题目：