【单选题】【消耗次数：1】
流行病学调查人员对新冠肺炎病例密切接触者进行调查时，与被调查对象保持（ ）
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相关题目
【单选题】
新冠肺炎流行病学调查时，可采集病例的哪些标本（ ）
【单选题】
新冠肺炎病例的密切接触者是指：
①
从疑似病例和确诊病例症状出现开始，或无症状感染者阳性标本采样当天开始，未采取有效防护与其有近距离接触的人员。
②
从疑似病例和确诊病例症状出现前2天开始，或无症状感染者阳性标本采样前2天开始，未采取有效防护与其有近距离接触的人员。
③
从疑似病例和确诊病例症状出现前14天开始，或无症状感染者阳性标本采样前14天开始，未采取有效防护与其有近距离接触的人员。
④
从疑似病例和确诊病例症状出现后2天开始，或无症状感染者阳性标本采样后2天开始，未采取有效防护与其有近距离接触的人员。
【单选题】
根据新冠肺炎常态化防控总体要求，应于（）内完成流行病学调查，充分发挥大数据等优势，尽快彻底查明可能的感染源，做好对密切接触者的判定和追踪管理：
①
24小时
②
48小时
③
72小时
④
5天
⑤
7天
【单选题】
基于目前的流行病学调查和研究结果，新冠肺炎的潜伏期为（ ）天
随机题目
【单选题】
According to the text, which of the following is NOT one of the possible activities for you to practice speaking English at school?
①
To talk to native speakers on campus.
②
To speak English to the waitress in English as you pay for a meal in a restaurant.
③
To rehearse aloud by yourself.
④
To talk with your classmates in English.
【单选题】
The place did not seem to be popular, for it was completely deserted, and in any case _____ to traffic.
①
inaccessible
②
inadequate
③
insignificant
④
incompatible
【单选题】
The head of the museum was _____and let us actually examine the ancient manuscripts.
①
promising
②
agreeing
③
pleasing
④
obliging
【单选题】
Lucy，who did not even go to grade school, had no ________of a job at the time.
①
interview
②
pressure
③
prospect
④
application
【单选题】
The lecture provided ____ insight into foreign affairs.
①
penetrating
②
pendular
③
passive
④
penal
【单选题】
Linda is 35 years o1d and, after two close relationships, the prospect of staying single__________ her.
①
impresses
②
depresses
③
threatens
④
stuns
【单选题】
The manager said that there were two reasons______ our sales dropped sharply last year.
①
because
②
since
③
why
④
while
【单选题】
Henry’ s actually ______ of telling lies, pretending to be sick when he s heathy.
①
capable
②
spontaneous
③
competent
④
expert
【单选题】
Mr. Brown had hardly said a word since supper,___ had his wife.
①
either
②
or
③
nor
④
So