【单选题】【消耗次数：1】
When a program has a small number of people_________ it, it is discontinued.
①
looking
②
watching
③
hearing
④
listening
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相关题目
【单选题】
The number of people invited ____fifty, but a number of them _____absent.
①
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The number of people who ______ cars of their own is increasing.
①
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With the help of the government , a large number of people ---_______ after the flood in 1991.
①
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【单选题】
When we speak to people, we should be ______.
①
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②
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③
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④
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①
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④
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①
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随机题目
【单选题】
以下关于疫苗临床试验的描述，哪一项是不正确的？
①
I期试验主要关注疫苗的安全性和耐受性
②
Ⅱ期试验仅评价疫苗的一般安全性信息
③
Ⅲ期试验是获得疫苗注册批准的基础
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IV期试验在疫苗注册上市后进行
⑤
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【单选题】
以下关于人用高致病性禽流感疫苗的说法中，哪一项是错误的？
①
DNA疫苗具有制备方便、稳定性好、易于保存和运输等优点
②
DNA疫苗的安全性已经得到了完全证实。
③
腺病毒载体疫苗减毒活疫苗可以有效诱导编码抗原的免疫反应。
④
腺病毒载体疫苗减毒活疫苗可以在不使用鸡胚等物料的情况下进行大规模生产。
⑤
通用流感疫苗的设计靶标包括M2蛋白的胞外部分（M2e）、核蛋白、HA上更为保守的区域和多聚酶蛋白等。